201
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Hojo M, Maeno A, Sakamoto Y, Yamamoto Y, Taquahashi Y, Hirose A, Suzuki J, Inomata A, Nakae D. Time-Course of Transcriptomic Change in the Lungs of F344 Rats Repeatedly Exposed to a Multiwalled Carbon Nanotube in a 2-Year Test. Nanomaterials (Basel) 2023; 13:2105. [PMID: 37513116 PMCID: PMC10383707 DOI: 10.3390/nano13142105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023]
Abstract
Despite intensive toxicological studies of carbon nanotubes (CNTs) over the last two decades, only a few studies have demonstrated their pulmonary carcinogenicities in chronic animal experiments, and the underlying molecular mechanisms are still unclear. To obtain molecular insights into CNT-induced lung carcinogenicity, we performed a transcriptomic analysis using a set of lung tissues collected from rats in a 2-year study, in which lung tumors were induced by repeated intratracheal instillations of a multiwalled carbon nanotube, MWNT-7. The RNA-seq-based transcriptome identified a large number of significantly differentially expressed genes at Year 0.5, Year 1, and Year 2. Ingenuity Pathway Analysis revealed that macrophage-elicited signaling pathways such as phagocytosis, acute phase response, and Toll-like receptor signaling were activated throughout the experimental period. At Year 2, cancer-related pathways including ERBB signaling and some axonal guidance signaling pathways such as EphB4 signaling were perturbed. qRT-PCR and immunohistochemistry indicated that several key molecules such as Osteopontin/Spp1, Hmox1, Mmp12, and ERBB2 were markedly altered and/or localized in the preneoplastic lesions, suggesting their participation in the induction of lung cancer. Our findings support a scenario of inflammation-induced carcinogenesis and contribute to a better understanding of the molecular mechanism of MWCNT carcinogenicity.
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Affiliation(s)
- Motoki Hojo
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Ai Maeno
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Yoshimitsu Sakamoto
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Yukio Yamamoto
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Yuhji Taquahashi
- Division of Cellular and Molecular Toxicology, Center for Biological Safety and Research, National Institute of Health Sciences, 3-25-26 Tono-machi, Kawasaki-ku, Kawasaki 210-9501, Kanagawa, Japan
| | - Akihiko Hirose
- Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute, Japan, 1-4-25 Koraku, Bunkyo-ku, Tokyo 112-0004, Japan
| | - Jin Suzuki
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Akiko Inomata
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan
| | - Dai Nakae
- Department of Medical Sports, Faculty of Health Care and Medical Sports, Teikyo Heisei University, 4-1 Uruido-Minami, Ichihara 290-0193, Chiba, Japan
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202
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Qian J, Cheng X, Zhou J, Cao J, Ding L. Aligned Carbon Nanotubes-Based Radiofrequency Transistors for Amplitude Amplification and Frequency Conversion at Millimeter Wave Band. ACS Nano 2023. [PMID: 37464538 DOI: 10.1021/acsnano.3c02739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Aligned carbon nanotubes (ACNTs) have been considered as a promising candidate semiconductor with great potential in radiofrequency (RF) electronics due to their high carrier mobility/saturation velocity and small intrinsic capacitance. However, almost all of previously reported works focused on only the cutoff frequency, which is far from enough for practical RF application. In this work, given the speed advantage of ACNTs, we further explore amplitude amplification and frequency conversion capability of ACNTs based RF devices simultaneously, which are two basic functions in RF electronics. Considering there is no de-embedding process for amplification/conversion and reduction power loss, multifinger configuration RF transistors (still having current density around 1 mA/μm) were fabricated with cutoff frequency and maximum oscillation frequency exceeding 150 and 130 GHz, respectively. Based on dedicated ACNTs based RF FETs, we demonstrate almost 7 dB power gain (S21) with over 40 GHz 3-dB bandwidth for amplification and from -12.7 to -17 dB of conversion gain with over 25 dBm IIP3 (input third-order intercept point) of linearity for conversion simultaneously operating at 30 GHz in millimeter wave (mmWave) band both without any tuning instruments and matching technology assistance. The performance achieved here is the best among all the nanomaterials at the mmWave band.
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Affiliation(s)
- Jiale Qian
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Hunan 411105, China
| | - Xiaohan Cheng
- Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, School of Electronics, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Jianshuo Zhou
- Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, School of Electronics, Peking University, Beijing 100871, China
| | - Juexian Cao
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Hunan 411105, China
| | - Li Ding
- Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, School of Electronics, Peking University, Beijing 100871, China
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203
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Xu Z, Dou T, Wang Y, Zuo H, Chen X, Zhang M, Zou L. Three-Dimensional-Printed Carbon Nanotube/Polylactic Acid Composite for Efficient Electromagnetic Interference Shielding. Polymers (Basel) 2023; 15:3080. [PMID: 37514468 PMCID: PMC10385445 DOI: 10.3390/polym15143080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/15/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
High-performance electromagnetic interference (EMI) shielding materials with ultralow density and environment-friendly properties are greatly demanded to address electromagnetic radiation pollution. Herein, carbon nanotube/polylactic acid (CNT/PLA) materials with different CNT contents, which exhibit characteristics of light weight, environmental protection and good chemical stability, are fabricated using 3D printing technology, where CNTs are evenly distributed and bind well with PLA. The performances of 3D-printed CNT/PLA composites are improved compared to pure 3D-printed PLA composites, which include mechanical properties, conductive behaviors and electromagnetic interference (EMI) shielding. The EMI shielding effectiveness (SE) of CNT/PLA composites could be improved when the content of CNTs increase. When it reaches 15 wt%, the EMI SE of 3D-printed CNT/PLA composites could get up to 47.1 dB, which shields 99.998% of electromagnetic energy. Meanwhile, the EMI shielding mechanism of 3D-printed CNT/PLA composites is mainly of absorption loss, and it generally accounts for more than 80% of the total shielding loss. These excellent comprehensive performances endow a 3D-printed CNT/PLA composite with great potential for use in industrial and aerospace areas.
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Affiliation(s)
- Zhenzhen Xu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
- Anhui Province International Cooperation Research Center of Textile Structure Composite Materials, Anhui Polytechnic University, Wuhu 241000, China
| | - Tiantian Dou
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Yazhou Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Hongmei Zuo
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
- Anhui Province International Cooperation Research Center of Textile Structure Composite Materials, Anhui Polytechnic University, Wuhu 241000, China
| | - Xinyu Chen
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Mingchun Zhang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Lihua Zou
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
- Anhui Province International Cooperation Research Center of Textile Structure Composite Materials, Anhui Polytechnic University, Wuhu 241000, China
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204
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Song S, Li L, Ji D, Zhao J, Wu Q, Wang Q. Flexible Basalt Fiber/Aramid Nanofiber/Carbon Nanotube Electromagnetic Shielding Paper with Outstanding Environmental Stability and Joule Heating Performance. ACS Appl Mater Interfaces 2023. [PMID: 37439589 DOI: 10.1021/acsami.3c06138] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
In the field of electromagnetic shielding, it has become an important trend to manufacture thinner and better-performing electromagnetic interference (EMI) shielding materials. However, EMI shielding materials that are recyclable and resistant to extreme environments are of great significance for sustainable development and expanding their application areas. In this study, a composite paper with a "rebar-concrete" layered structure through the vacuum-assisted filtration approach by utilizing basalt fibers (BF) and aramid nanofibers (ANFs) with excellent temperature resistance and multiwalled carbon nanotubes with high electrical conductivity was prepared. The composite paper not only delivers a high electrical conductivity of 15.9 S cm-1 and a high electromagnetic interference shielding efficiency (EMI SE) of 24.6 dB but also exhibits a high specific shielding efficiency (SSE/t) of 12,504 dB cm2 g-1 at a thickness of 48 μm. Thanks to the excellent thermal stability of basalt fibers and aramid nanofibers, the composite paper exhibits long-term stable EMI shielding performance and structural integrity in various extreme environments, including fire, high/low temperature (-196 to 300 °C), and acid-base corrosion. Furthermore, the BF/ANF/CNT composite paper also shows excellent Joule heating performance, rapid electrothermal response, and good temperature controllability. Based on these excellent properties, the BF/ANF/CNT composite paper shows tremendous potential for practical applications to meet the requirements of various extreme environments.
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Affiliation(s)
- Shunxi Song
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, China
- Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Linghao Li
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Dexian Ji
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Junfan Zhao
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Qi Wu
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Qianyu Wang
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science & Technology, Xi'an 710021, China
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205
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Li W, Zhao Y, Pan X, Liu M, Qiu S, Xie Z. Structure and Properties of Carboxylated Carbon Nanotubes@Expanded Graphite/Polyethersulfone Composite Bipolar Plates for PEM. Nanomaterials (Basel) 2023; 13:2055. [PMID: 37513068 PMCID: PMC10384210 DOI: 10.3390/nano13142055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023]
Abstract
Composite bipolar plates (BPs) hinder their application in proton exchange membrane fuel cells (PEMFC) because of their poor conductivity and mechanical properties. Nanofillers can effectively solve this problem but often have a limited effect due to their easy agglomeration. In this work, a continuous mesh carboxylated multi-walled carbon nanotube (MWCNT) coating on the surface of graphite was synthesized by chemical vapor deposition (CVD) and carboxylation modification, and the composite BPs were prepared by molding using prepared reticulated carboxylated MWCNTs, expanded graphite, and resin. By optimizing the carboxylation treatment time and the content of the nano-filler, the composite BPs had the best performance at a 15 min carboxylation treatment time and 2.4% filler content. The planar conductivity reached up to 243.52 S/cm, while the flexural strength increased to 61.9 MPa. The thermal conductivity and hydrophobicity were improved compared with the conventional graphite/resin composite BPs, and good corrosion resistance has been demonstrated under the PEMFC operating environment. This work provides a novel nanofiller modification paradigm for PBs.
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Affiliation(s)
- Wenkai Li
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
| | - Yixin Zhao
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
| | - Xingchen Pan
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
| | - Mingqi Liu
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
| | - Shi Qiu
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
| | - Zhiyong Xie
- Carbon-Carbon Composite Materials Research Institute, Powder Metallurgy Research Institute, Central South University, Changsha 410017, China
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206
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Wise HG, Takana H, Dichiara AB. Dynamic Assembly of Strong and Conductive Carbon Nanotube/Nanocellulose Composite Filaments and Their Application in Resistive Liquid Sensing. ACS Appl Mater Interfaces 2023. [PMID: 37437162 DOI: 10.1021/acsami.3c03906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
The continuous flow assembly of colloidal nanoparticles from aqueous suspensions into macroscopic materials in a field-assisted double flow focusing system offers an attractive way to bridge the outstanding nanoscale characteristics of renewable cellulose nanofibrils (CNFs) at scales most common to human technologies. By incorporating single-walled carbon nanotubes (SWNTs) during the fabrication process, high-performance functional filament nanocomposites were produced. CNFs and SWNTs were first dispersed in water without any external surfactants or binding agents, and the resulting nanocolloids were aligned by means of an alternating electric field combined with extensional sheath flows. The nanoscale orientational anisotropy was then locked by a liquid-gel transition during the materials assembly into macroscopic filaments, which greatly improved their mechanical, electrical, and liquid sensing properties. Significantly, these findings pave the way toward the environmentally friendly and scalable manufacturing of a variety of multifunctional fibers for diverse applications.
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Affiliation(s)
- Heather G Wise
- School of Environmental & Forest Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Hidemasa Takana
- Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
| | - Anthony B Dichiara
- School of Environmental & Forest Sciences, University of Washington, Seattle, Washington 98195, United States
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207
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Peng J, Zhou P, Zhou H, Huang B, Sun M, He CS, Zhang H, Ao Z, Liu W, Lai B. Removal of Phenols by Highly Active Periodate on Carbon Nanotubes: A Mechanistic Investigation. Environ Sci Technol 2023. [PMID: 37431633 DOI: 10.1021/acs.est.2c08266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Carbon nanotubes (CNTs) and their derivatives have been widely exploited to activate various oxidants for environmental remediation. However, the intrinsic mechanism of CNTs-driven periodate (PI) activation remains ambiguous, which significantly impedes their scientific progress toward practical application. Here, we found that CNTs can strongly boost PI activation for the oxidation of various phenols. Reactive oxygen species analysis, in situ Raman characterization, galvanic oxidation process experiments, and electrochemical tests revealed that CNTs could activate PI to form high-potential metastable intermediates (CNTs-PI*) rather than produce free radicals and 1O2, thereby facilitating direct electron transfer from the pollutants to PI. Additionally, we analyzed quantitative structure-activity relationships between rate constants of phenols oxidation and double descriptors (e.g., Hammett constants and logarithm of the octanol-water partition coefficient). The adsorption of phenols on CNT surfaces and their electronic properties are critical factors affecting the oxidation process. Besides, in the CNTs/PI system, phenol adsorbed the CNT surfaces was oxidized by the CNTs-PI* complexes, and products were mainly generated via the coupling reaction of phenoxyl radical. Most of the products adsorbed and accumulated on the CNT surfaces realized phenol removal from the bulk solution. Such a unique non-mineralization removal process achieved an extremely high apparent electron utilization efficiency of 378%. The activity evaluation and theoretical calculations of CNT derivatives confirmed that the carbonyl/ketonic functional groups and double-vacancy defects of the CNTs were the primary active sites, where high-oxidation-potential CNTs-PI* were formed. Further, the PI species could achieve a stoichiometric decomposition into iodate, a safe sink of iodine species, without the generation of typical iodinated byproducts. Our discovery provides new mechanistic insight into CNTs-driven PI activation for the green future of environmental remediation.
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Affiliation(s)
- Jiali Peng
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
| | - Peng Zhou
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Hongyu Zhou
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Bingkun Huang
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Minglu Sun
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Chuan-Shu He
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Heng Zhang
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Zhimin Ao
- Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China
| | - Wen Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Bo Lai
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
- Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
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208
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Mouecoucou R, Bonnaud L, Dubois P. Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs). Materials (Basel) 2023; 16:4901. [PMID: 37512176 PMCID: PMC10381602 DOI: 10.3390/ma16144901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023]
Abstract
Negative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (<10 kHz) in non-conducting polymer-based nanocomposites containing conductive particles. In this contribution, we demonstrate that it is possible to produce economic high-density polyethylene (HDPE) nanocomposites exhibiting an NC effect at low frequencies via a convenient and environmentally friendly extrusion-like process by only adjusting the duration of melt-mixing. Nanocomposite materials are produced by confining a limited quantity, i.e., 4.6 wt.%, of multiwalled carbon nanotubes (CNTs) within semi-crystalline HDPE to reach the percolation threshold. With increasing melt processing time, crystallites of HDPE developing at the surface of CNTs become bigger and perturbate the connections between CNTs leading to a dramatic change in the electrical behavior of the systems. More specifically, the link between NC and current oscillations is stressed while the dependence of NC with the size of polymer crystallites is evidenced. NC tends to appear when space charge effects take place in HDPE/MWCNT interfaces, in structures with convenient crystallite sizes corresponding to 10 min of melt-mixing.
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Affiliation(s)
- Raymonde Mouecoucou
- Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), Université de Lorraine, 2 Rue Edouard Belin, 57070 Metz, France
| | - Leïla Bonnaud
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
| | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
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209
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Alhotan A, Abdelraouf RM, El-Korashy SA, Labban N, Alotaibi H, Matinlinna JP, Hamdy TM. Effect of Adding Silver-Doped Carbon Nanotube Fillers to Heat-Cured Acrylic Denture Base on Impact Strength, Microhardness, and Antimicrobial Activity: A Preliminary Study. Polymers (Basel) 2023; 15:2976. [PMID: 37447621 DOI: 10.3390/polym15132976] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
Poly (methyl methacrylate) (PMMA), is an acrylic polymer substance that is mostly used for denture base applications. The purpose of this laboratory study was to investigate the effect of adding 0.05 wt.% Ag-doped carbon nanotubes (CNT) to PMMA-based (PMMA and MMA) denture base material on the impact strength, microhardness, and antimicrobial activity. A total of 60 heat-cured acrylic resin specimens were prepared. The specimens were randomly divided into two main groups (n = 30/group), according to the powder used: (a) control group, using heat-cured PMMA; (b) treatment group, using a powder prepared by blending 0.05 wt.% silver-doped CNT nanoparticles with heat-cured PMMA. The impact strength, microhardness and anticandidal activity for each group were assessed via the Charpy, Vickers and agar diffusion tests, respectively (n = 10/test for each subgroup). Data were analyzed using independent-sample t-tests (p ≤ 0.05). The results of the impact strength test revealed that the treated heat-cured PMMA-MMA with Ag-doped CNT (2.2 kJ/mm2) was significantly higher than that of the control heat-cured PMMA (1.6 kJ/mm2). Similarly, the Vickers microhardness of the treatment group (52.7 VHN) was significantly higher than that of the control group (19.4 VHN). Regarding the agar diffusion test, after 24 h of incubation, the treated heat-cured PMMA with the Ag-doped CNT exhibited significantly higher anticandidal activity than that of the control group. Therefore, Ag-doped carbon nanotubes could be considered as promising fillers for the dental heat-cured acrylic resin to improve the resistance of the resultant denture against sudden fractures, scratching, and candida invasion.
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Affiliation(s)
- Abdulaziz Alhotan
- Department of Dental Health, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 12372, Saudi Arabia
| | - Rasha M Abdelraouf
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo 11553, Egypt
| | - Sabry A El-Korashy
- Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41511, Egypt
| | - Nawaf Labban
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia
| | - Hanan Alotaibi
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia
| | - Jukka P Matinlinna
- Biomaterials Science, Division of Dentistry, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL, UK
| | - Tamer M Hamdy
- Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), El Bohouth St., Dokki, Giza 12622, Egypt
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210
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Xu Y, Ferguson T, Masuda K, Siddiqui MA, Smith KP, Vest O, Brooks B, Zhou Z, Obliosca J, Kong XP, Jiang X, Yamashita M, Moriya T, Tison C. Short Carbon Nanotube-Based Delivery of mRNA for HIV-1 Vaccines. Biomolecules 2023; 13:1088. [PMID: 37509124 PMCID: PMC10377108 DOI: 10.3390/biom13071088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/26/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Developing a safe and effective preventive for HIV-1 remains the hope for controlling the global AIDS epidemic. Recently, mRNA vaccines have emerged as a promising alternative to conventional vaccine approaches, primarily due to their rapid development and potential for low-cost manufacture. Despite the advantages of mRNA vaccines, challenges remain, especially due to the adverse effects of the delivery vehicle and low delivery efficiency. As a result, Luna Labs is developing a short carbon nanotube-based delivery platform (NanoVac) that can co-deliver mRNA and HIV-1 glycoproteins to the immune system efficiently with negligible toxicity. Surface chemistries of NanoVac were optimized to guide antigen/mRNA loading density and presentation. Multiple formulations were engineered for compatibility with both intramuscular and intranasal administration. NanoVac candidates demonstrated immunogenicity in rabbits and generated human-derived humoral and cellular responses in humanized mice (HIS). Briefly, 33% of the HIV-1-infected HIS mice vaccinated with NanoVac-mRNA was cleared of virus infection by 8-weeks post-infection. Finally, NanoVac stabilized the loaded mRNA against degradation under refrigeration for at least three months, reducing the cold chain burden for vaccine deployment.
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Affiliation(s)
- Yang Xu
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Tammy Ferguson
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Kazuya Masuda
- Aaron Diamond AIDS Research Center, Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Mohammad Adnan Siddiqui
- Aaron Diamond AIDS Research Center, Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Kelsi Poole Smith
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Olivia Vest
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Brad Brooks
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Ziyou Zhou
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Judy Obliosca
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
| | - Xiang-Peng Kong
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - Xunqing Jiang
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - Masahiro Yamashita
- Aaron Diamond AIDS Research Center, Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Tsuji Moriya
- Aaron Diamond AIDS Research Center, Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Christopher Tison
- Luna Labs USA, 706 Forest St. Suite A, Charlottesville, VA 22903, USA
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211
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Nalesso PRL, Vedovatto M, Gregório JES, Huang B, Vyas C, Santamaria-Jr M, Bártolo P, Caetano GF. Early In Vivo Osteogenic and Inflammatory Response of 3D Printed Polycaprolactone/Carbon Nanotube/Hydroxyapatite/Tricalcium Phosphate Composite Scaffolds. Polymers (Basel) 2023; 15:2952. [PMID: 37447597 DOI: 10.3390/polym15132952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
The development of advanced biomaterials and manufacturing processes to fabricate biologically and mechanically appropriate scaffolds for bone tissue is a significant challenge. Polycaprolactone (PCL) is a biocompatible and degradable polymer used in bone tissue engineering, but it lacks biofunctionalization. Bioceramics, such as hydroxyapatite (HA) and β tricalcium phosphate (β-TCP), which are similar chemically to native bone, can facilitate both osteointegration and osteoinduction whilst improving the biomechanics of a scaffold. Carbon nanotubes (CNTs) display exceptional electrical conductivity and mechanical properties. A major limitation is the understanding of how PCL-based scaffolds containing HA, TCP, and CNTs behave in vivo in a bone regeneration model. The objective of this study was to evaluate the use of three-dimensional (3D) printed PCL-based composite scaffolds containing CNTs, HA, and β-TCP during the initial osteogenic and inflammatory response phase in a critical bone defect rat model. Gene expression related to early osteogenesis, the inflammatory phase, and tissue formation was evaluated using quantitative real-time PCR (RT-qPCR). Tissue formation and mineralization were assessed by histomorphometry. The CNT+HA/TCP group presented higher expression of osteogenic genes after seven days. The CNT+HA and CNT+TCP groups stimulated higher gene expression for tissue formation and mineralization, and pro- and anti-inflammatory genes after 14 and 30 days. Moreover, the CNT+TCP and CNT+HA/TCP groups showed higher gene expressions related to M1 macrophages. The association of CNTs with ceramics at 10wt% (CNT+HA/TCP) showed lower expressions of inflammatory genes and higher osteogenic, presenting a positive impact and balanced cell signaling for early bone formation. The association of CNTs with both ceramics promoted a minor inflammatory response and faster bone tissue formation.
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Affiliation(s)
- Paulo Roberto Lopes Nalesso
- Graduate Program in Biomedical Sciences, University Centre of Hermínio Ometto Foundation, Araras 13607-339, SP, Brazil
| | - Matheus Vedovatto
- Graduate Program in Biomedical Sciences, University Centre of Hermínio Ometto Foundation, Araras 13607-339, SP, Brazil
| | | | - Boyang Huang
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Jurong West, Singapore 639798, Singapore
| | - Cian Vyas
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Jurong West, Singapore 639798, Singapore
- School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK
| | - Milton Santamaria-Jr
- Graduate Program of Orthodontics, University Centre of Hermínio Ometto Foundation, Araras 13607-339, SP, Brazil
- Department of Social and Pediatric Dentistry, UNESP - São Paulo State University, Institute of Science and Technology - College of Dentistry, São José dos Campos 12245-000, SP, Brazil
| | - Paulo Bártolo
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Jurong West, Singapore 639798, Singapore
- School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK
| | - Guilherme Ferreira Caetano
- Graduate Program in Biomedical Sciences, University Centre of Hermínio Ometto Foundation, Araras 13607-339, SP, Brazil
- Graduate Program of Orthodontics, University Centre of Hermínio Ometto Foundation, Araras 13607-339, SP, Brazil
- Division of Dermatology, Department of Internal Medicine, Ribeirão Preto Medical School, São Paulo University (USP), Ribeirão Preto 14049-900, SP, Brazil
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212
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Dokuchaeva AA, Vladimirov SV, Borodin VP, Karpova EV, Vaver AA, Shiliaev GE, Chebochakov DS, Kuznetsov VA, Surovtsev NV, Adichtchev SV, Malikov AG, Gulov MA, Zhuravleva IY. Influence of Single-Wall Carbon Nanotube Suspension on the Mechanical Properties of Polymeric Films and Electrospun Scaffolds. Int J Mol Sci 2023; 24:11092. [PMID: 37446270 DOI: 10.3390/ijms241311092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Carbon nanotubes (CNTs) are used in applications ranging from electrical engineering to medical device manufacturing. It is well known that the addition of nanotubes can influence the mechanical properties of various industrial materials, including plastics. Electrospinning is a popular method for fabricating nanomaterials, widely suggested for polymer scaffold manufacturing. In this study, we aimed to describe the influence of single-walled carbon nanotube (SWCNT) suspensions on polymeric poured films and electrospun scaffolds and to investigate their structural and mechanical properties obtained from various compositions. To obtain films and electrospun scaffolds of 8 mm diameter, we used poly-ε-caprolactone (PCL) and poly(cyclohexene carbonate) (PCHC) solutions containing several mass fractions of SWCNT. The samples were characterized using tensile tests, atomic force and scanning electronic microscopy (AFM and SEM). All the studied SWCNT concentrations were shown to decrease the extensibility and strength of electrospun scaffolds, so SWCNT use was considered unsuitable for this technique. The 0.01% mass fraction of SWCNT in PCL films increased the polymer strength, while fractions of 0.03% and more significantly decreased the polymer strength and extensibility compared to the undoped polymer. The PHCH polymeric films showed a similar behavior with an extremum at 0.02% concentration for strength at break.
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Affiliation(s)
- Anna A Dokuchaeva
- Institute of Experimental Biology and Medicine, Federal State Budgetary Institution National Medical Research Center Named after Academician E.N. Meshalkin of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya St., Novosibirsk 630055, Russia
| | - Sergey V Vladimirov
- Institute of Experimental Biology and Medicine, Federal State Budgetary Institution National Medical Research Center Named after Academician E.N. Meshalkin of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya St., Novosibirsk 630055, Russia
| | - Vsevolod P Borodin
- Institute of Experimental Biology and Medicine, Federal State Budgetary Institution National Medical Research Center Named after Academician E.N. Meshalkin of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya St., Novosibirsk 630055, Russia
| | - Elena V Karpova
- Group of Optical Spectrometry, Center of Spectral Investigations, N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Andrey A Vaver
- Institute of Experimental Biology and Medicine, Federal State Budgetary Institution National Medical Research Center Named after Academician E.N. Meshalkin of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya St., Novosibirsk 630055, Russia
| | - Gleb E Shiliaev
- LLC "Tuball Center NSK", 24 Inzhenernaya St., Novosibirsk 630090, Russia
| | | | - Vasily A Kuznetsov
- I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS), S. Kovalevskoy St., 22/20, Yekaterinburg 620108, Russia
| | - Nikolay V Surovtsev
- Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences, Academician Koptyug Avenue, 1, Novosibirsk 630090, Russia
| | - Sergey V Adichtchev
- Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences, Academician Koptyug Avenue, 1, Novosibirsk 630090, Russia
| | - Alexander G Malikov
- Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 4/1, Novosibirsk 630090, Russia
| | - Mikhail A Gulov
- Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 4/1, Novosibirsk 630090, Russia
| | - Irina Y Zhuravleva
- Institute of Experimental Biology and Medicine, Federal State Budgetary Institution National Medical Research Center Named after Academician E.N. Meshalkin of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya St., Novosibirsk 630055, Russia
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213
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Guo Z, Liu X, Lin Y, Sang Z, Chen D. Hyaluronic acid modified carbon nanotubes using for photothermal therapy by promoting apoptosis of nasopharyngeal carcinoma cells. Front Bioeng Biotechnol 2023; 11:1229852. [PMID: 37469448 PMCID: PMC10352790 DOI: 10.3389/fbioe.2023.1229852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023] Open
Abstract
Background: The present work illustrates the role of multi-walled carbon nanotubes in photothermal therapy. Nasopharyngeal carcinoma (NPC) is a malignant tumor of the head and neck with significant ethnic and geographic differences, and conventional treatment options are no longer suitable to improve the prognosis and survival of patients. Photothermal therapy (PTT) has emerged as a new strategy for oncology treatment in recent years and is now used in the treatment of many common cancers. Multi-walled carbon nanotubes (MWCNT) have been used to advantage in several fields due to their excellent thermal conductivity. The aim of this paper is to investigate the promotion of apoptosis of nasopharyngeal cancer cells by multi-walled carbon nanotubes as an adjuvant nanomaterial for nasopharyngeal cancer photothermal therapy. Methods: Carboxylated multi-walled carbon nanotubes and prepared multi-walled carbon nanotube-hyaluronic acid (MWCNT-HA) composites were used for cell proliferation-related experiments such as CCK-8 assay, live-dead staining and flow cytometric analysis and inverted fluorescence microscopy to determine the expression level of apoptotic factors and confocal microscopy cell morphology analysis on nasopharyngeal carcinoma CNE-1 cells under near-infrared laser irradiation. The effects of multi-walled carbon nanotubes on the proliferation and apoptosis of tumor cells under NIR response were elucidated, and the mechanism of apoptosis was explored. Results: TEM and SEM demonstrated that MWCNT had good appearance morphology and the temperature rise curve indicated excellent photothermal stability. And MWCNT and MWCNT-HA could significantly inhibit the proliferation of tumor cells and change the normal morphology of cells under NIR laser irradiation. Cellular immunofluorescence analysis confirmed that MWCNT-HA significantly upregulated the expression level of apoptosis factor Caspase-3 and significantly downregulated the expression level of anti-apoptosis factor Bcl-2. Conclusion: In this study, MWCNT inhibited the proliferation of tumor cells and promoted apoptosis through the use of multi-walled carbon nanotubes as an adjuvant nanomaterial for photothermal therapy. In addition, multi-walled carbon nanotubes could inhibit the mitochondrial pathway of CNE-1 cells to cause cell death. These studies suggest that multi-walled carbon nanotubes can function as efficient photothermal conversion materials for tumor photothermal therapy.
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Affiliation(s)
- Zeyu Guo
- The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Xianzhi Liu
- The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Yiyi Lin
- The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Zelin Sang
- Jinzhou Medical University, Jinzhou, China
| | - Dong Chen
- The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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214
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Lushnikova A, Plé O, De Souza Gomes Y, Jia X, Yang W. Strength and Electrical Properties of Cementitious Composite with Integrated Carbon Nanotubes. Materials (Basel) 2023; 16:4771. [PMID: 37445085 DOI: 10.3390/ma16134771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023]
Abstract
The main objective of this work was to study the effects of carbon nanotubes (CNTs) on the strength and electrical properties of cement mortar. Molecular dynamic simulations (MDSs) were carried out to determine the mechanical and electrical properties of a cementitious composite and its associated mechanisms. To model the atomic structure of a calcium silicate hydrate (C-S-H) gel, tobermorite 11Å was chosen. Single-walled carbon nanotubes (SWCNTs) embedded in a tobermorite structure were tested numerically. In particular, it was concluded that a piezoelectric effect can be effectively simulated by varying the concentration levels of carbon nanotubes. The deformation characteristics were analyzed by subjecting a sample to an electrical field of 250 MV/m in the z-direction in a simulation box. The results indicated a progressively stronger converse piezoelectric response with an increasing proportion of carbon nanotubes. Additionally, it was observed that the piezoelectric constant in the z-direction, denoted by d33, also increased correspondingly, thereby validating the potential for generating an electrical current during sample deformation. An innovative experiment was developed for the electrical characterization of a cementitious composite of carbon nanotubes. The results showed that the electrostatic current measurements exhibited a higher electric sensitivity for samples with a higher concentration of CNTs.
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Affiliation(s)
- Anna Lushnikova
- Laboratoire Procédés Energie Batiment, Université Savoie Mont Blanc, Unité Mixte de Recherche du CNRS 5271, Institut National de l'Energie Solaire, 73000 Chambéry, France
| | - Olivier Plé
- Laboratoire Procédés Energie Batiment, Université Savoie Mont Blanc, Unité Mixte de Recherche du CNRS 5271, Institut National de l'Energie Solaire, 73000 Chambéry, France
| | - Yago De Souza Gomes
- Laboratoire Procédés Energie Batiment, Université Savoie Mont Blanc, Unité Mixte de Recherche du CNRS 5271, Institut National de l'Energie Solaire, 73000 Chambéry, France
| | - Xiaohui Jia
- Laboratoire Procédés Energie Batiment, Université Savoie Mont Blanc, Unité Mixte de Recherche du CNRS 5271, Institut National de l'Energie Solaire, 73000 Chambéry, France
| | - Wei Yang
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China
- National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China
- College of Civil Engineering, Hunan University, Changsha 410082, China
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215
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Bokobza L. Elastomer Nanocomposites: Effect of Filler-Matrix and Filler-Filler Interactions. Polymers (Basel) 2023; 15:2900. [PMID: 37447545 DOI: 10.3390/polym15132900] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/25/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
The reinforcement of elastomers is essential in the rubber industry in order to obtain the properties required for commercial applications. The addition of active fillers in an elastomer usually leads to an improvement in the mechanical properties such as the elastic modulus and the rupture properties. Filled rubbers are also characterized by two specific behaviors related to energy dissipation known as the Payne and the Mullins effects. The Payne effect is related to non-linear viscoelastic behavior of the storage modulus while the Mullins or stress-softening effect is characterized by a lowering in the stress when the vulcanizate is extended a second time. Both effects are shown to strongly depend on the interfacial adhesion and filler dispersion. The basic mechanisms of reinforcement are first discussed in the case of conventional rubber composites filled with carbon black or silica usually present in the host matrix in the form of aggregates and agglomerates. The use of nanoscale fillers with isotropic or anisotropic morphologies is expected to yield much more improvement than that imparted by micron-scale fillers owing to the very large polymer-filler interface. This work reports some results obtained with three types of nanoparticles that can reinforce rubbery matrices: spherical, rod-shaped and layered fillers. Each type of particle is shown to impart to the host medium a specific reinforcement on account of its own structure and geometry. The novelty of this work is to emphasize the particular mechanical behavior of some systems filled with nanospherical particles such as in situ silica-filled poly(dimethylsiloxane) networks that display a strong polymer-filler interface and whose mechanical response is typical of double network elastomers. Additionally, the potential of carbon dots as a reinforcing filler for elastomeric materials is highlighted. Different results are reported on the reinforcement imparted by carbon nanotubes and graphenic materials that is far below their expected capability despite the development of various techniques intended to reduce particle aggregation and improve interfacial bonding with the host matrix.
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Affiliation(s)
- Liliane Bokobza
- Independent Researcher, 194-196 Boulevard Bineau, 92200 Neuilly-Sur-Seine, France
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216
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Ozkan S, Petrov V, Vasilev A, Chernavskii P, Efimov M, Muratov D, Pankina G, Karpacheva G. Formation Features of Polymer-Metal-Carbon Ternary Electromagnetic Nanocomposites Based on Polyphenoxazine. Polymers (Basel) 2023; 15:2894. [PMID: 37447539 DOI: 10.3390/polym15132894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
Novel ternary hybrid polyphenoxazine (PPOA)-derived nanocomposites involving Co-Fe particles and single-walled (SWCNTs) or multi-walled (MWCNTs) carbon nanotubes were prepared and investigated. An efficient one-pot method employing infrared (IR) heating enabled the formation of Co-Fe/CNT/PPOA nanocomposites. During this, the dehydrogenation of phenoxazine (POA) units led to the simultaneous reduction of metals by released hydrogen, yielding bimetallic Co-Fe particles with a size range from the nanoscale (5-30 nm) to the microscale (400-1400 nm). The synthesized Co-Fe/CNT/PPOA nanomaterials exhibited impressive thermal stability, demonstrating a half-weight loss at 640 °C and 563 °C in air for Co-Fe/SWCNT/PPOA and Co-Fe/MWCNT/PPOA, respectively. Although a slightly broader range of saturation magnetization values was obtained using MWCNTs, it was found that the type of carbon nanotube, whether an SWCNT (22.14-41.82 emu/g) or an MWCNT (20.93-44.33 emu/g), did not considerably affect the magnetic characteristics of the resulting nanomaterial. By contrast, saturation magnetization escalated with an increasing concentration of both cobalt and iron. These nanocomposites demonstrated a weak dependence of electrical conductivity on frequency. It is shown that the conductivity value for hybrid nanocomposites is higher compared to single-polymer materials and becomes higher with increasing CNT content.
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Affiliation(s)
- Sveta Ozkan
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
| | - Valeriy Petrov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
| | - Andrey Vasilev
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
| | - Petr Chernavskii
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
- Department of Chemistry Lomonosov, Moscow State University, 1-3 Leninskie Gory, Moscow 119991, Russia
| | - Mikhail Efimov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
| | - Dmitriy Muratov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
| | - Galina Pankina
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
- Department of Chemistry Lomonosov, Moscow State University, 1-3 Leninskie Gory, Moscow 119991, Russia
| | - Galina Karpacheva
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow 119991, Russia
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217
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Kamanina N. Refractive Properties of Conjugated Organic Materials Doped with Fullerenes and Other Carbon-Based Nano-Objects. Polymers (Basel) 2023; 15:2819. [PMID: 37447464 DOI: 10.3390/polym15132819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/13/2023] [Accepted: 06/17/2023] [Indexed: 07/15/2023] Open
Abstract
Due to the high demand for optoelectronics for use in new materials and processes, as well as the search for their modeling properties, the expansion of the functionality of modified materials using nanotechnology methods is relevant and timely. In the current paper, a specific nanotechnology approach is shown to increase the refractive and photoconductive parameters of the organic conjugated materials. The sensitization process, along with laser treatment, are presented in order to improve the basic physical-chemical properties of laser, solar energy, and general photonics materials. Effective nanoparticles, such as fullerenes, shungites, reduced graphene oxides, carbon nanotubes, etc., are used in order to obtain the bathochromic shift, increase the laser-induced change in the refractive index, and amplify the charge carrier mobility of the model matrix organics sensitized with these nanoparticles. The four-wave mixing technique is applied to test the main refractive characteristics of the studied materials. Volt-current measurements are used to estimate the increased charge carrier mobility. The areas of application for the modified nanostructured plastic matrixes are discussed and extended, while also taking into account the surface relief.
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Affiliation(s)
- Natalia Kamanina
- Vavilov State Optical Institute, Kadetskaya Liniya V.O. 5/2, 199053 St. Petersburg, Russia
- Department of Photonics, St. Petersburg Electrotechnical University ("LETI"), ul. Prof. Popova 5, 197376 St. Petersburg, Russia
- Petersburg Nuclear Physics Institute, Part of Kurchatov National Research Center, 1 md. Orlova Roshcha, 188300 Gatchina, Russia
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218
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Abreu S, Vale N, Soares OSGP. Combination of CNTs with Classical Drugs for Treatment in Human Colorectal Adenocarcinoma (HT-29) Cell Line. Nanomaterials (Basel) 2023; 13:1933. [PMID: 37446448 DOI: 10.3390/nano13131933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
Due to the increase in new types of cancer cells and resistance to drugs, conventional cancer treatments are sometimes insufficient. Therefore, an alternative is to apply nanotechnology to biomedical areas, minimizing side effects and drug resistance and improving treatment efficacy. This work aims to find a promising cancer treatment in the human colorectal adenocarcinoma cell line (HT-29) to minimize the viability of cells (IC50) by using carbon nanotubes (CNTs) combined with different drugs (5-fluorouracil (5-FU) and two repurposing drugs-tacrine (TAC) and ethionamide (ETA). Several CNT samples with different functional groups (-O, -N, -S) and textural properties were prepared and characterized by elemental and thermogravimetry analysis, size distribution, and textural and temperature programmed desorption. The samples that interacted most with the drugs and contributed to improving HT-29 cell treatment were samples doped with nitrogen and sulfur groups (CNT-BM-N and CNT-H2SO4-BM) with IC50 1.98 and 2.50 µmol∙dm-3 from 5-FU and 15.32 and 15.81 µmol∙dm-3 from TAC. On the other hand, ETA had no activity, even combined with the CNTs. These results allow us to conclude that the activity was improved for both 5-FU and TAC when combined with CNTs.
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Affiliation(s)
- Sara Abreu
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- OncoPharma Research Group, Center for Health Technology and Services Research (CINTESIS), Rua Dr. Plácido da Costa, 4200-450 Porto, Portugal
| | - Nuno Vale
- OncoPharma Research Group, Center for Health Technology and Services Research (CINTESIS), Rua Dr. Plácido da Costa, 4200-450 Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal
- Department of Community Medicine, Health Information and Decision (MEDCIDS), Faculty of Medicine, University of Porto, Rua Dr. Plácido da Costa, 4200-450 Porto, Portugal
| | - Olívia Salomé G P Soares
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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219
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Shao M, Shi Y, Liu J, Xue B, Niu M. Cooperative Effect of Ni-Decorated Monolayer WS 2, NiO, and AC on Improving the Flame Retardancy and Mechanical Property of Polypropylene Blends. Polymers (Basel) 2023; 15:2791. [PMID: 37447438 DOI: 10.3390/polym15132791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 07/15/2023] Open
Abstract
Improving the residual char of polypropylene (PP) is difficult due to the preferential complete combustion. Here, we designed a combination catalyst that not only provides physical barrier effects, but also dramatically promotes catalytic charring activity. We successfully synthesized WS2 monolayer sheets decorated with isolated Ni atoms that bond covalently to sulfur vacancies on the basal planes via thiourea. Subsequently, PP blends composed of 8 wt.% Ni-decorated WS2, NiO, and activated carbon (AC) were obtained (ENi-SWS2-AC-PP). Combining the physical barrier effects of WS2 monolayer sheets with the excellent catalytic carbonization ability of the ENi-SWS2-AC combination catalyst, the PP blends showed a remarkable improvement in flame retardancy, with the yield of residual char reaching as high as 41.6 wt.%. According to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations, it was revealed that the microstructure of residual char contained a large number of carbon nanotubes. The production of a large amount of residual char not only reduced the release of pyrolytic products, but also formed a thermal shield preventing oxygen and heat transport. Compared to pure PP, the peak heat release rate (pHRR) and total heat release rate (THR) of ENi-SWS2-AC-PP were reduced by 46.32% and 26.03%, respectively. Furthermore, benefiting from the highly dispersed WS2, the tensile strength and Young's modulus of ENi-SWS2-AC-PP showed similar values to pure PP, without sacrificing the toughness.
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Affiliation(s)
- Mingqiang Shao
- College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yiran Shi
- College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Jiangtao Liu
- College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Baoxia Xue
- College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Mei Niu
- College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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Patel V, Joshi U, Joshi A, Matanda BK, Chauhan K, Oza AD, Burduhos-Nergis DP, Burduhos-Nergis DD. Multi-Walled Carbon-Nanotube-Reinforced PMMA Nanocomposites: An Experimental Study of Their Friction and Wear Properties. Polymers (Basel) 2023; 15:2785. [PMID: 37447431 DOI: 10.3390/polym15132785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/20/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
This manuscript presents an experimental investigation of the friction and wear properties of poly (methyl methacrylate) (PMMA) nanocomposites reinforced with functionalized multi-walled carbon nanotubes (MWCNTs). The aim of this study is to evaluate the potential of MWCNTs as a reinforcement material for enhancing the tribological performance of PMMA. Three types of multi-walled carbon nanotubes, i.e., pristine, hydroxyl functionalized, and carboxyl functionalized, were utilized in this study. The nanocomposite samples were prepared by dispersing varying concentrations of MWCNTs (0.1 wt.%, 0.5 wt.%, and 1 wt.%) within the PMMA matrix via a 3D mixing approach, followed by injection molding/compression molding. The resulting nanocomposite films were characterized using scanning electron microscopy (SEM) to observe the dispersion of MWCNTs within the PMMA matrix. The friction and wear tests were conducted using a pin-on-disk tribometer under dry sliding conditions. The effects of functionalization and MWCNT content on the tribological behaviors of the nanocomposites were analyzed. The nanocomposites exhibited lower friction coefficients and reduced wear rates compared to pure PMMA. The lowest friction coefficient and wear rate were achieved at an optimum MWCNT loading of 0.5 wt.%. It was further revealed that the amount of MWCNT reinforcement, average load, and track diameter significantly affect the coefficient of friction (COF) and rate of wear. The COF and wear rate are best at a filler loading of 0.5 wt.%, a 20 Kg load, and 90 mm. The improved tribological performance of the MWCNT-reinforced PMMA nanocomposites can be attributed to the effective transfer of load between the MWCNTs and the PMMA matrix, as well as the reinforcement effect of the MWCNTs. The MWCNTs acted as reinforcing agents, enhancing the mechanical properties and wear resistance of the nanocomposites.
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Affiliation(s)
- Vijay Patel
- Department of Mechanical Engineering, Parul University, Vadodara 391760, Gujarat, India
| | - Unnati Joshi
- Department of Mechanical Engineering, Parul University, Vadodara 391760, Gujarat, India
| | - Anand Joshi
- Department of Mechatronics Engineering, Parul University, Vadodara 391760, Gujarat, India
| | | | - Kamlesh Chauhan
- Department of Mechanical Engineering, Charusat University, Anand 388421, Gujarat, India
| | - Ankit D Oza
- Department of Computer Sciences and Engineering, Institute of Advanced Research, Gandhinagar 382426, Gujarat, India
| | | | - Dumitru-Doru Burduhos-Nergis
- Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, 700050 Iasi, Romania
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221
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Azzam EMS, Elsofany WI, Abdulaziz F, AlGhamdi HA, Al Alhareth AY. Ecofriendly Elimination of Ni (II) Using Fabricated Nanocomposite Based on Chitosan/Silver Nanoparticles/ Carbon Nanotubes. Polymers (Basel) 2023; 15:2759. [PMID: 37447405 DOI: 10.3390/polym15132759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/04/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023] Open
Abstract
Nickel ions are hazardous heavy metals that are non-biodegradable and can lead to allergic sensitivity and dermatitis. Nanomaterials are chosen for their effective elimination of impurities from water structures based entirely on the variety of therapy and degree of purification. The target of this work was the combination of the properties of biopolymers such as chitosan, silver nanoparticles (SNPs), and carbon nanotubes (CNTs) in one ecofriendly compound for Ni (II) uptake from the aqueous solution. To attain this target, the endeavor was made by creating a nanocomposite based on chitosan/SNPs/CNTs. The characterization of the structure of the fabricated nanocomposite (Chit-SNPs-CNTs) was carried out using different techniques. The removal of Ni (II) was examined by studying the adsorption of Ni (II) ions onto the fabricated nanocomposite by batch adsorption using UV, XRD, XPS, and ICP techniques. Moreover, we investigated the effect of the contact time, pH of the solution, and mass of the adsorbent on the efficiency of the adsorption of Ni (II). The results show that the adsorption capacity of Ni (II) increased by increasing the contact time with a neutral pH. The maximum removal of Ni (II) ions (99.70%) was found using 0.3 g of the (Chit-SNPs-CNTs) nanocomposite. In addition, the results indicate that the fabricated nanocomposite has a high adsorption effectivity, which is associated to the function of the chitosan, SNPs, and CNTs in upgrading the adsorption efficiency. Finally, the results in the existing work indicate that the ecofriendly nanocomposite organized here gave excessive effectivity closer to the elimination of Ni (II).
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Affiliation(s)
- Eid M S Azzam
- Department of Chemistry, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia
- Egyptian Petroleum Research Institute, Cairo 11727, Egypt
| | - Walaa I Elsofany
- Department of Chemistry, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia
- Photochemistry Department, Chemical Industries Research Division, National Research Centre, 33 EL Buhouth St., Dokki, Giza 12622, Egypt
| | - Fahad Abdulaziz
- Department of Chemistry, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia
| | - Hind A AlGhamdi
- Chemistry Department, College of Science, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Abdullah Y Al Alhareth
- Department of Chemistry, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia
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222
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Ibrahim MH, Hamzah N, Mohd Yusop MZ, Septiani NLW, Mohd Yasin MF. Control of morphology and crystallinity of CNTs in flame synthesis with one-dimensional reaction zone. Beilstein J Nanotechnol 2023; 14:741-750. [PMID: 37377745 PMCID: PMC10291239 DOI: 10.3762/bjnano.14.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023]
Abstract
The growth of carbon nanotubes (CNTs) in a flame requires conditions that are difficult to achieve in a highly heterogeneous environment. Therefore, the analysis of the properties of the reaction zone within the flame is critical for the optimal growth of CNTs. In the present study, a comprehensive comparison between the CNT synthesis using a methane diffusion flame and a premixed flame is conducted regarding the morphology and crystallinity of the as-grown nanotubes. The premixed burner configuration created a flame that is stabilized through axisymmetric stagnation flow through sintered metal with one-dimensional geometry, different from a conventional co-flow flame. The significant difference in temperature distribution between the two flames causes a difference in the characteristics of the growth products. In the diffusion flame, the growth is limited to specific regions at certain height-above-burner (HAB) values with a temperature range of 750 to 950 °C at varying radial locations. The identified growth regions at different HAB values showed similar temperature distributions that yield CNTs of similar characteristics. Interestingly, the growth of CNTs in the premixed flame is dictated by only the HAB because the temperature distribution is relatively uniform along the radial directions but significantly different in the vertical direction. 17.3% variation in temperature in the axial direction successfully led to 44% and 66% variation in CNT diameter and crystallinity, respectively. The morphology control capability demonstrated in the present study is important for CNT functionalization for energy storage, nanosensor, and nanocomposite applications, where diameter and crystallinity are influential properties that govern the overall performance of the components.
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Affiliation(s)
- Muhammad Hilmi Ibrahim
- Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- High Speed Reacting Flow Laboratory (HiREF), Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
| | - Norikhwan Hamzah
- Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- High Speed Reacting Flow Laboratory (HiREF), Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
| | - Mohd Zamri Mohd Yusop
- Advanced Membrane Technology Research Center, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
| | | | - Mohd Fairus Mohd Yasin
- Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- High Speed Reacting Flow Laboratory (HiREF), Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
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Vargas-Figueroa C, Pino-Soto L, Beratto-Ramos A, Tapiero Y, Rivas BL, Berrio ME, Melendrez MF, Bórquez RM. In-Situ Modification of Nanofiltration Membranes Using Carbon Nanotubes for Water Treatment. Membranes (Basel) 2023; 13:616. [PMID: 37504982 PMCID: PMC10385991 DOI: 10.3390/membranes13070616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/08/2023] [Accepted: 06/19/2023] [Indexed: 07/29/2023]
Abstract
Modification of thin-film composite (TFC) nanofiltration (NF) membranes to increase permeability and improve separation performance remains a significant challenge for water scarcity. This study aimed to enhance the permeability and selectivity of two commercial polyamide (PA) NF membranes, NF90 and NF270, by modifying them with carbon nanotubes (CNTs) using microwave (MW)-assisted in-situ growth. The conducting polymer, polypyrrole (Ppy), and a ferrocene catalyst were used to facilitate the growth process. Chemical and morphological analyses confirmed that the surface of both membranes was modified. The NF270-Ppy-CNT membrane was selected for ion rejection testing due to its superior permeability compared to the NF90-Ppy-CNT. The modified NF270 membrane showed a 14% increase in ion rejection while maintaining constant water permeability. The results demonstrated that it is feasible to attach CNTs to a polymeric surface without compromising its functional properties. The Spliegler-Kedem model was employed to model the rejection and permeate flux of NF270-Ppy-CNT and NF270 membranes, which indicated that diffusive transport contributes to the modification to increase NaCl rejection. The present study provides a promising approach for modifying membranes by in-situ CNT growth to improve their performance in water treatment applications, such as desalination.
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Affiliation(s)
- Catalina Vargas-Figueroa
- Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Concepción, Edmundo Larenas 219, Concepción 4070409, Chile
| | - Luis Pino-Soto
- Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Concepción, Edmundo Larenas 219, Concepción 4070409, Chile
| | - Angelo Beratto-Ramos
- Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Concepción, Edmundo Larenas 219, Concepción 4070409, Chile
| | - Yesid Tapiero
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Concepción 4070371, Chile
| | - Bernabé Luis Rivas
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Concepción 4070371, Chile
| | - María Elizabeth Berrio
- Advanced Nanocomposites Research Group (GINA), Departamento de Ingeniería en Materiales (DIMAT), Universidad de Concepción, Edmundo Larenas 315, Concepción 4070415, Chile
| | - Manuel Francisco Melendrez
- Advanced Nanocomposites Research Group (GINA), Departamento de Ingeniería en Materiales (DIMAT), Universidad de Concepción, Edmundo Larenas 315, Concepción 4070415, Chile
| | - Rodrigo M Bórquez
- Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Concepción, Edmundo Larenas 219, Concepción 4070409, Chile
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224
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Neelgund GM, Jimenez EA, Ray RL, Kurkuri MD. Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes. Toxics 2023; 11:545. [PMID: 37368645 DOI: 10.3390/toxics11060545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 06/15/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023]
Abstract
By considering the importance of water and its purity, herein, a powerful adsorbent has been developed for the adsorption of two toxic contaminants that commonly exist in water, viz., divalent mercury and hexavalent chromium. The efficient adsorbent, CNTs-PLA-Pd, was prepared by covalent grafting polylactic acid to carbon nanotubes and subsequent deposition of palladium nanoparticles. The CNTs-PLA-Pd could adsorb Hg(II), and Cr(VI) entirely exists in water. The adsorption rate for Hg(II) and Cr(VI) was rapid at initial stage, followed by gradual decrease, and attained the equilibrium. The Hg(II) and Cr(VI) adsorption was perceived within 50 min and 80 min, respectively with CNTs-PLA-Pd,. Further, experimental data for Hg(II) and Cr(VI) adsorption was analyzed, and kinetic parameters were estimated using pseudo-first and second-order models. The adsorption process of Hg(II) and Cr(VI) followed the pseudo-second-order kinetics, and the rate-limiting step in the adsorption was chemisorption. The Weber-Morris intraparticle pore diffusion model revealed that the Hg(II) and Cr(VI) adsorption over CNTs-PLA-Pd occurs through multiple phases. The experimental equilibrium parameters for the Hg(II) and Cr(VI) adsorption were estimated by Langmuir, Freundlich, and Temkin isotherms models. All three models were well suited and demonstrated that Hg(II) and Cr(VI) adsorption over CNTs-PLA-Pd transpires through monolayer molecular covering and chemisorption.
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Affiliation(s)
- Gururaj M Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Erica A Jimenez
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Ram L Ray
- College of Agriculture and Human Sciences, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Mahaveer D Kurkuri
- Centre for Research in Functional Materials (CRFM), JAIN (Deemed-to-be University), Jain Global Campus, Bengaluru 562 112, Karnataka, India
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225
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Jella G, Panda DK, Sapkota N, Greenough M, Datta SP, Rao AM, Sujith R, Bordia RK. Electrochemical Performance of Polymer-Derived Silicon-Oxycarbide/Graphene Nanoplatelet Composites for High-Performance Li-Ion Batteries. ACS Appl Mater Interfaces 2023. [PMID: 37309875 DOI: 10.1021/acsami.3c00571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Amorphous polymer-derived silicon-oxycarbide (SiOC) ceramics have a high theoretical capacity and good structural stability, making them suitable anode materials for lithium-ion batteries. However, SiOC has low electronic conductivity, poor transport properties, low initial Couloumbic efficiency, and limited rate capability. Therefore, there is an urgent need to explore an efficient SiOC-based anode material that could mitigate the abovementioned limitations. In this study, we synthesized carbon-rich SiOC (SiOC-I) and silicon-rich SiOC (SiOC-II) and evaluated their elemental and structural characteristics using a broad spectrum of characterization techniques. Li-ion cells were fabricated for the first time by pairing a buckypaper composed of carbon nanotubes with SiOC-I or SiOC-II as the anode. When mixed with graphene nanoplatelets, the SiOC-II/GNP composites exhibited improved electrochemical performance. High specific capacity (average specific capacity of 744 mAh/g at a 0.1C rate) was achieved with the composite anode (25 wt % SiOC-II and 75% GNP), which was much better than that of monolithic SiOC-I, SiOC-II, or GNPs. This composite also exhibited excellent cycling stability, achieving 344 mAh/g after 260 cycles at a 0.5C rate and high reversibility. The enhanced electrochemical performance is attributed to better electronic conductivity, lower charge-transfer resistance, and short ion diffusion length. Due to their superior electrochemical performance, SiOC/GNP composites with CNT buckypaper as a current collector can be considered a promising anode material for LiBs.
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Affiliation(s)
- Gangadhar Jella
- Mechanical Engineering Department, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078, India
- Materials Centre for Sustainable Energy and Environment, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078 India
| | - Dillip K Panda
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Nawraj Sapkota
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina 29634, United States
| | - Michelle Greenough
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Santanu P Datta
- Mechanical Engineering Department, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078, India
- Materials Centre for Sustainable Energy and Environment, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078 India
| | - Apparao M Rao
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina 29634, United States
| | - Ravindran Sujith
- Mechanical Engineering Department, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078, India
- Materials Centre for Sustainable Energy and Environment, Birla Institute of Technology and Science Pilani-Hyderabad Campus, Hyderabad, Telangana 500078 India
| | - Rajendra K Bordia
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
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226
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Pikula K, Johari SA, Santos-Oliveira R, Golokhvast K. Toxicity and Biotransformation of Carbon-Based Nanomaterials in Marine Microalgae Heterosigma akashiwo. Int J Mol Sci 2023; 24:10020. [PMID: 37373170 DOI: 10.3390/ijms241210020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
This work is related to the environmental toxicology risk assessment and evaluation of the possible transformation of carbon-based nanomaterials (CNMs) after contact with marine microalgae. The materials used in the study represent common and widely applied multi-walled carbon nanotubes (CNTs), fullerene (C60), graphene (Gr), and graphene oxide (GrO). The toxicity was evaluated as growth rate inhibition, esterase activity, membrane potential, and reactive oxygen species generation changes. The measurement was performed with flow cytometry after 3, 24, 96 h, and 7 days. The biotransformation of nanomaterials was evaluated after 7 days of microalgae cultivation with CNMs by FTIR and Raman spectroscopy. The calculated toxic level (EC50 in mg/L, 96 h) of used CNMs reduced in the following order: CNTs (18.98) > GrO (76.77) > Gr (159.40) > C60 (414.0). Oxidative stress and membrane depolarization were the main toxic action of CNTs and GrO. At the same time, Gr and C60 decreased the toxic action with time and had no negative impact on microalgae after 7 days of exposure even at the concentration of 125 mg/L. Moreover, C60 and Gr after 7 days of contact with microalgae cells obtained structural deformations.
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Affiliation(s)
- Konstantin Pikula
- Polytechnical Institute, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia
| | - Seyed Ali Johari
- Department of Fisheries, Faculty of Natural Resources, University of Kurdistan, Pasdaran St, Sanandaj 66177-15175, Iran
| | - Ralph Santos-Oliveira
- Laboratory of Nanoradiopharmaceuticals and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute, Brazilian Nuclear Energy Commission, Rua Hélio de Almeida 75, Rio de Janeiro 21941906, Brazil
- Laboratory of Nanoradiopharmaceuticals and Radiopharmacy, Rio de Janeiro State University, R. São Francisco Xavier, 524, Rio de Janeiro 23070200, Brazil
| | - Kirill Golokhvast
- Polytechnical Institute, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia
- Siberian Federal Scientific Center of Agrobiotechnology RAS, Centralnaya Str., Presidium, 633501 Krasnoobsk, Russia
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227
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Natsuki T, Natsuki J. Constitutive Modeling of Mechanical Behaviors of Carbon-Based CNTs and GSs, and Their Sensing Applications as Nanomechanical Resonators: A Review. Nanomaterials (Basel) 2023; 13:1834. [PMID: 37368264 DOI: 10.3390/nano13121834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/01/2023] [Accepted: 06/08/2023] [Indexed: 06/28/2023]
Abstract
Carbon-based nanomaterials, including carbon nanotubes (CNTs) and graphene sheets (GSs), have garnered considerable research attention owing to their unique mechanical, physical, and chemical properties compared with traditional materials. Nanosensors are sensing devices with sensing elements made of nanomaterials or nanostructures. CNT- and GS-based nanomaterials have been proved to be very sensitive nanosensing elements, being used to detect tiny mass and force. In this study, we review the developments in the analytical modeling of mechanical behavior of CNTs and GSs, and their potential applications as next-generation nanosensing elements. Subsequently, we discuss the contributions of various simulation studies on theoretical models, calculation methods, and mechanical performance analyses. In particular, this review intends to provide a theoretical framework for a comprehensive understanding of the mechanical properties and potential applications of CNTs/GSs nanomaterials as demonstrated by modeling and simulation methods. According to analytical modeling, nonlocal continuum mechanics pose small-scale structural effects in nanomaterials. Thus, we overviewed a few representative studies on the mechanical behavior of nanomaterials to inspire the future development of nanomaterial-based sensors or devices. In summary, nanomaterials, such as CNTs and GSs, can be effectively utilized for ultrahigh-sensitivity measurements at a nanolevel resolution compared to traditional materials.
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Affiliation(s)
- Toshiaki Natsuki
- College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China
- Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Nagano, Japan
| | - Jun Natsuki
- Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Nagano, Japan
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228
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Yang DC, Castellano RJ, Silvy RP, Lageshetty SK, Praino RF, Fornasiero F, Shan JW. Fast Water Transport through Subnanometer Diameter Vertically Aligned Carbon Nanotube Membranes. Nano Lett 2023. [PMID: 37272837 DOI: 10.1021/acs.nanolett.3c00797] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Small-diameter carbon nanotubes (CNTs) have outstanding mass-transport properties, especially enhanced water flow. Here, we report on water transport through the first macroscopic membranes with vertically oriented, subnanometer (0.8 nm) CNT pores, made by a scalable, solution-based method with electric-field alignment of bulk-grown single-wall CNTs (SWCNTs). After plasma etching to open pores, vertically aligned CNTs served as the primary pathway for liquid-water transport. The CNT membranes showed fast pressure-driven water transport, with up to 105-fold enhancement compared to no-slip Hagen-Poiseuille flow. Comparing 0.8 and 3 nm CNTs, we found that the hydrodynamic slip lengths increased with decreasing nanotube diameter, reaching 8.5 μm for the smaller-diameter CNTs. The results suggest that pressure-driven water transport in small-diameter CNTs is increasingly dominated by entrance resistance, thus becoming independent of nanotube length. Scalably fabricated membranes incorporating vertically aligned subnanometer CNT pores could have applications in water filtration, desalination, and energy harvesting.
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Affiliation(s)
- Da-Chi Yang
- Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Richard J Castellano
- Applications Development Center, Chasm Advanced Materials, Canton, Massachusetts 02021, United States
| | - Ricardo Prada Silvy
- Applications Development Center, Chasm Advanced Materials, Canton, Massachusetts 02021, United States
| | - Sathish K Lageshetty
- Applications Development Center, Chasm Advanced Materials, Canton, Massachusetts 02021, United States
| | - Robert F Praino
- Applications Development Center, Chasm Advanced Materials, Canton, Massachusetts 02021, United States
| | - Francesco Fornasiero
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Jerry W Shan
- Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, United States
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229
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Parasuram S, Banerjee P, Raj R, Kumar S, Bose S. Electrophoretically Deposited Multiscale Graphene Oxide/Carbon Nanotube Construct Mediated Interfacial Engineering in Carbon Fiber Epoxy Composites. ACS Appl Mater Interfaces 2023. [PMID: 37272545 DOI: 10.1021/acsami.3c04538] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fiber-reinforced polymer composites as a structural material have garnered tremendous interest over the past few decades. In particular, carbon fiber-reinforced epoxy (CFRE) laminates have seen extensive use in the aircraft and aerospace industry. The role of the interface between the matrix and fiber is critical and dictates the overall structural properties of the CFRE laminate. Herein, we attempt to use a commercially viable, green, and facile approach, electrophoretic deposition (EPD), to deposit covalently coupled multiscale graphene oxide (GO)/carbon nanotube (CNT) nanoconstructs onto carbon fiber (CF) fabric. The rationale behind using these hybrid conjugates is to exploit the positive synergistic effect of combining two-dimensional (2D) GO and one-dimensional (1D) CNT nanoparticles, which provide strengthening through different mechanisms resulting in a stronger matrix/fiber interface. The modified laminate with just 0.1 wt % GO/CNT content exhibited an improvement in flexural strength (FS) by 24% and interlaminar shear strength (ILSS) by 30% compared to the neat CFRE. Scanning electron microscope (SEM) micrographs confirmed uniform and homogeneous GO and GO/CNT deposition on CF. Raman, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analyses validate the successful functionalization of CNT and covalent coupling of GO and CNT. Atomic force microscope (AFM) and contact angle analyses indicate improved interaction between the CF and matrix. The deposition of the GO/CNT nanoconstruct on the CF improved the performance of CFREs owing to enhanced wettability, surface free energy, and surface roughness, leading to increased mechanical interlocking between the epoxy and CF at the interface. Dynamic mechanical analysis showed decreased segmental motion of epoxy chains due to improved interfacial adhesion following modification. Interesting observations were made in SEM fractography, which showed considerably different failure mechanisms in the modified CFREs. Electromagnetic interference (EMI) shielding effectiveness of -45 dB was achieved in the case of the GO/CNT-CFRE system. Electrothermal heating and de-icing performance of the modified system were also explored in this study. This versatile approach can open up new avenues for CFRE modification leading to considerably improved performance.
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Affiliation(s)
- Sampath Parasuram
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Poulami Banerjee
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Rishi Raj
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - S Kumar
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
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230
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Formica G, Lacarbonara W, Yabuno H. Nonlinear Dynamic Response of Nanocomposite Microbeams Array for Multiple Mass Sensing. Nanomaterials (Basel) 2023; 13:nano13111808. [PMID: 37299710 DOI: 10.3390/nano13111808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 05/28/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
A nonlinear MEMS multimass sensor is numerically investigated, designed as a single input-single output (SISO) system consisting of an array of nonlinear microcantilevers clamped to a shuttle mass which, in turn, is constrained by a linear spring and a dashpot. The microcantilevers are made of a nanostructured material, a polymeric hosting matrix reinforced by aligned carbon nanotubes (CNT). The linear as well as the nonlinear detection capabilities of the device are explored by computing the shifts of the frequency response peaks caused by the mass deposition onto one or more microcantilever tips. The frequency response curves of the device are obtained by a pathfollowing algorithm applied to the reduced-order model of the system. The microcantilevers are described by a nonlinear Euler-Bernoulli inextensible beam theory, which is enriched by a meso-scale constitutive law of the nanocomposite. In particular, the microcantilever constitutive law depends on the CNT volume fraction suitably used for each cantilever to tune the frequency bandwidth of the whole device. Through an extensive numerical campaign, the mass sensor sensitivity estimated in the linear and nonlinear dynamic range shows that, for relatively large displacements, the accuracy of the added mass detectability can be improved due to the larger nonlinear frequency shifts at resonance (up to 12%).
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Affiliation(s)
- Giovanni Formica
- Department of Architecture, Roma Tre University, 33328 Rome, Italy
| | - Walter Lacarbonara
- Department of Structural and Geotechnical Engineering, Sapienza University of Rome, 33328 Rome, Italy
| | - Hiroshi Yabuno
- Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba 300-4352, Japan
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231
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Parikh SD, Wang W, Nelson MT, Sulentic CEW, Mukhopadhyay SM. Bioinspired Hierarchical Carbon Structures as Potential Scaffolds for Wound Healing and Tissue Regeneration Applications. Nanomaterials (Basel) 2023; 13:nano13111791. [PMID: 37299693 DOI: 10.3390/nano13111791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Engineered bio-scaffolds for wound healing provide an attractive treatment option for tissue engineering and traumatic skin injuries since they can reduce dependence on donors and promote faster repair through strategic surface engineering. Current scaffolds present limitations in handling, preparation, shelf life, and sterilization options. In this study, bio-inspired hierarchical all-carbon structures comprising carbon nanotube (CNT) carpets covalently bonded to flexible carbon fabric have been investigated as a platform for cell growth and future tissue regeneration applications. CNTs are known to provide guidance for cell growth, but loose CNTs are susceptible to intracellular uptake and are suspected to cause in vitro and in vivo cytotoxicity. This risk is suppressed in these materials due to the covalent attachment of CNTs on a larger fabric, and the synergistic benefits of nanoscale and micro-macro scale architectures, as seen in natural biological materials, can be obtained. The structural durability, biocompatibility, tunable surface architecture, and ultra-high specific surface area of these materials make them attractive candidates for wound healing. In this study, investigations of cytotoxicity, skin cell proliferation, and cell migration were performed, and results indicate promise in both biocompatibility and directed cell growth. Moreover, these scaffolds provided cytoprotection against environmental stressors such as Ultraviolet B (UVB) rays. It was seen that cell growth could also be tailored through the control of CNT carpet height and surface wettability. These results support future promise in the design of hierarchical carbon scaffolds for strategic wound healing and tissue regeneration applications.
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Affiliation(s)
- Soham D Parikh
- Department of Mechanical & Materials Engineering, Wright State University, 3640 Col. Glen Hwy, Dayton, OH 45435, USA
| | - Wenhu Wang
- Frontier Institute for Research in Sensor Technologies (FIRST), University of Maine, United States Air Force Research Laboratory, Orono, ME 04469, USA
| | - M Tyler Nelson
- 711th Human Performance Wing, Airman Systems Directorate, Bioengineering Division, Wright-Patterson Air Force Base, Dayton, OH 45433, USA
| | - Courtney E W Sulentic
- Department of Pharmacology and Toxicology, Wright State University, Boonshoft School of Medicine, 3640 Col. Glen Hwy, Dayton, OH 45435, USA
| | - Sharmila M Mukhopadhyay
- Frontier Institute for Research in Sensor Technologies (FIRST), University of Maine, United States Air Force Research Laboratory, Orono, ME 04469, USA
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232
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Peters R, Beijer N, 't Hul BV, Bruijns B, Munniks S, Knotter J. Evaluation of a Commercial Electronic Nose Based on Carbon Nanotube Chemiresistors. Sensors (Basel) 2023; 23:s23115302. [PMID: 37300031 DOI: 10.3390/s23115302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/23/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Recently a hand-held, carbon-nanotube-based electronic nose became available on the market. Such an electronic nose could be interesting for applications in the food industry, health monitoring, environmental monitoring, and security services. However, not much is known about the performance of such an electronic nose. In a series of measurements, the instrument was exposed to low ppm vapor concentrations of four volatile organic compounds with different scent profiles and polarities. Detection limits, linearity of response, repeatability, reproducibility, and scent patterns were determined. The results indicate detection limits in the range of 0.1-0.5 ppm and a linear signal response in the range of 0.5-8.0 ppm. The repeatability of the scent patterns at compound concentrations of 2 ppm allowed the identification of the tested volatiles based on their scent pattern. However, the reproducibility was not sufficient, since different scent profiles were produced on different measurement days. In addition, it was noted that the response of the instrument diminished over time (over several months) possibly by sensor poisoning. The latter two aspects limit the use of the current instrument and make future improvements necessary.
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Affiliation(s)
- Ruud Peters
- Lectorate Technologies for Criminal Investigations, Saxion University of Applied Sciences, Handelskade 75, 7417 DH Deventer, The Netherlands
| | - Niels Beijer
- Lectorate Technologies for Criminal Investigations, Saxion University of Applied Sciences, Handelskade 75, 7417 DH Deventer, The Netherlands
| | - Bauke van 't Hul
- Academy of Applied Biosciences and Chemistry, HAN University of Applied Sciences, Laan van Scheut 2, 6525 EM Nijmegen, The Netherlands
| | - Brigitte Bruijns
- Lectorate Technologies for Criminal Investigations, Saxion University of Applied Sciences, Handelskade 75, 7417 DH Deventer, The Netherlands
| | - Sandra Munniks
- Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands
| | - Jaap Knotter
- Lectorate Technologies for Criminal Investigations, Saxion University of Applied Sciences, Handelskade 75, 7417 DH Deventer, The Netherlands
- Dutch Police Academy, Arnhemseweg 348, 7334 AC Apeldoorn, The Netherlands
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233
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Dong Y, Zhang B, Zhao F, Gao F, Liu D. Dendrimer Based Binders Enable Stable Operation of Silicon Microparticle Anodes in Lithium-Ion Batteries. Small 2023; 19:e2206858. [PMID: 36929041 DOI: 10.1002/smll.202206858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 02/13/2023] [Indexed: 06/15/2023]
Abstract
High-capacity anode materials (e.g., Si) are highly needed for high energy density battery systems, but they usually suffer from low initial coulombic efficiency (CE), short cycle life, and low-rate capability caused by large volume changes during the charge and discharge process. Here, a novel dendrimer-based binder for boosting the electrochemical performance of Si anodes is developed. The polyamidoamine (PMM) dendrimer not only can be used as binder, but also can be utilized as a crosslinker to construct 3D polyacrylic acid (PAA)-PMM composite binder for high-performance Si microparticles anodes. Benefiting from maximum interface interaction, strong average peeling force, and high elastic recovery rate of PAA-PMM composite, the Si electrode based on PAA-PMM achieves a high specific capacity of 3590 mAh g-1 with an initial CE of 91.12%, long-term cycle stability with 69.80% retention over 200 cycles, and outstanding rate capability (1534.8 mAh g-1 at 3000 mA g-1 ). This work opens a new avenue to use dendrimer chemistry for the development of high-performance binders for high-capacity anode materials.
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Affiliation(s)
- Yanling Dong
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Biao Zhang
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Fugui Zhao
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Feng Gao
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Dong Liu
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
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234
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Kothandam G, Singh G, Guan X, Lee JM, Ramadass K, Joseph S, Benzigar M, Karakoti A, Yi J, Kumar P, Vinu A. Recent Advances in Carbon-Based Electrodes for Energy Storage and Conversion. Adv Sci (Weinh) 2023; 10:e2301045. [PMID: 37096838 PMCID: PMC10288283 DOI: 10.1002/advs.202301045] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/27/2023] [Indexed: 05/03/2023]
Abstract
Carbon-based nanomaterials, including graphene, fullerenes, and carbon nanotubes, are attracting significant attention as promising materials for next-generation energy storage and conversion applications. They possess unique physicochemical properties, such as structural stability and flexibility, high porosity, and tunable physicochemical features, which render them well suited in these hot research fields. Technological advances at atomic and electronic levels are crucial for developing more efficient and durable devices. This comprehensive review provides a state-of-the-art overview of these advanced carbon-based nanomaterials for various energy storage and conversion applications, focusing on supercapacitors, lithium as well as sodium-ion batteries, and hydrogen evolution reactions. Particular emphasis is placed on the strategies employed to enhance performance through nonmetallic elemental doping of N, B, S, and P in either individual doping or codoping, as well as structural modifications such as the creation of defect sites, edge functionalization, and inter-layer distance manipulation, aiming to provide the general guidelines for designing these devices by the above approaches to achieve optimal performance. Furthermore, this review delves into the challenges and future prospects for the advancement of carbon-based electrodes in energy storage and conversion.
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Affiliation(s)
- Gopalakrishnan Kothandam
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Gurwinder Singh
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Xinwei Guan
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Jang Mee Lee
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Kavitha Ramadass
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Stalin Joseph
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Mercy Benzigar
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Ajay Karakoti
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Jiabao Yi
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Prashant Kumar
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials (GICAN)College of Engineering, Science and Environment (CESE)The University of NewcastleCallaghanNSW2308Australia
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235
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Fedorov G, Hafizi R, Semenenko V, Perebeinos V. Metal Contact Induced Unconventional Field Effect in Metallic Carbon Nanotubes. Nanomaterials (Basel) 2023; 13:nano13111774. [PMID: 37299677 DOI: 10.3390/nano13111774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
One-dimensional carbon nanotubes (CNTs) are promising for future nanoelectronics and optoelectronics, and an understanding of electrical contacts is essential for developing these technologies. Although significant efforts have been made in this direction, the quantitative behavior of electrical contacts remains poorly understood. Here, we investigate the effect of metal deformations on the gate voltage dependence of the conductance of metallic armchair and zigzag CNT field effect transistors (FETs). We employ density functional theory calculations of deformed CNTs under metal contacts to demonstrate that the current-voltage characteristics of the FET devices are qualitatively different from those expected for metallic CNT. We predict that, in the case of armchair CNT, the gate-voltage dependence of the conductance shows an ON/OFF ratio of about a factor of two, nearly independent of temperature. We attribute the simulated behavior to modification of the band structure under the metals caused by deformation. Our comprehensive model predicts a distinct feature of conductance modulation in armchair CNTFETs induced by the deformation of the CNT band structure. At the same time, the deformation in zigzag metallic CNTs leads to a band crossing but not to a bandgap opening.
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Affiliation(s)
- Georgy Fedorov
- Institute of Photonics, University of Eastern Finland, 999018 Joensuu, Finland
| | - Roohollah Hafizi
- Department of Physics and Astronomy and Thomas Young Centre, University College London, London WC1E 6BT, UK
| | - Vyacheslav Semenenko
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Vasili Perebeinos
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
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236
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Awati A, Zhou S, Shi T, Zeng J, Yang R, He Y, Zhang X, Zeng H, Zhu D, Cao T, Xie L, Liu M, Kong B. Interfacial Super-Assembly of Intertwined Nanofibers toward Hybrid Nanochannels for Synergistic Salinity Gradient Power Conversion. ACS Appl Mater Interfaces 2023. [PMID: 37235387 DOI: 10.1021/acsami.3c03464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Capturing the abundant salinity gradient power into electric power by nanofluidic systems has attracted increasing attention and has shown huge potential to alleviate the energy crisis and environmental pollution problems. However, not only the imbalance between permeability and selectivity but also the poor stability and high cost of traditional membranes limit their scale-up realistic applications. Here, intertwined "soft-hard" nanofibers/tubes are densely super-assembled on the surface of anodic aluminum oxide (AAO) to construct a heterogeneous nanochannel membrane, which exhibits smart ion transport and improved salinity gradient power conversion. In this process, one-dimensional (1D) "soft" TEMPO-oxidized cellulose nanofibers (CNFs) are wrapped around "hard" carbon nanotubes (CNTs) to form three-dimensional (3D) dense nanochannel networks, subsequently forming a CNF-CNT/AAO hybrid membrane. The 3D nanochannel networks constructed by this intertwined "soft-hard" nanofiber/tube method can significantly enhance the membrane stability while maintaining the ion selectivity and permeability. Furthermore, benefiting from the asymmetric structure and charge polarity, the hybrid nanofluidic membrane displays a low membrane inner resistance, directional ionic rectification characteristics, outstanding cation selectivity, and excellent salinity gradient power conversion performance with an output power density of 3.3 W/m2. Besides, a pH sensitive property of the hybrid membrane is exhibited, and a higher power density of 4.2 W/m2 can be achieved at a pH of 11, which is approximately 2 times more compared to that of pure 1D nanomaterial based homogeneous membranes. These results indicate that this interfacial super-assembly strategy can provide a way for large-scale production of nanofluidic devices for various fields including salinity gradient energy harvesting.
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Affiliation(s)
- Abuduheiremu Awati
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Shan Zhou
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
| | - Ting Shi
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Jie Zeng
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
| | - Ran Yang
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Yanjun He
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
| | - Xin Zhang
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
| | - Hui Zeng
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
| | - Dazhang Zhu
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Tongcheng Cao
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Lei Xie
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Mingxian Liu
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Biao Kong
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China
- Yiwu Research Institute of Fudan University, Yiwu, Zhejiang 322000, P. R. China
- Shandong Research Institute, Fudan University, Shandong 250103, P. R. China
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237
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de Sousa RR, Heinze DA, Sacramento JB, Lanfredi AJC, Carastan DJ. Electrical Conductivity and In Situ SAXS Probing of Block Copolymer Nanocomposites Under Mechanical Stretching. ACS Appl Mater Interfaces 2023. [PMID: 37235644 DOI: 10.1021/acsami.3c03573] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Elastomers based on block copolymers can self-organize into ordered nanoscale structures, making them attractive for use as flexible conductive nanocomposites. Understanding how ordered structures impact electrical properties is essential for practical applications. This study investigated the morphological evolution of flexible conductive elastomers based on polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) block copolymers with aligned single- or multi-wall carbon nanotubes (SWCNTs or MWCNTs) and their electrical conductivity under large deformations. Oriented nanocomposites were obtained through injection molding and characterized using two different setups: tensile testing monitored by in situ small-angle X-ray scattering (SAXS) and tensile testing with simultaneous electrical conductivity measurements. Our findings demonstrate that structural orientation significantly influences electrical conductivity, with higher conductivity in the longitudinal direction due to the preferred orientation of carbon nanotubes. Tensile testing demonstrated that carbon nanotubes accelerate the process of realignment of the ordered structure. As a consequence, higher deformations reduced the conductivity of samples with longitudinal alignment due to the disruption of percolation contacts between nanotubes, while in samples with a transverse alignment the process promoted the formation of a new conductive network, increasing electrical conductivity.
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Affiliation(s)
- Rogerio R de Sousa
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. Dos Estados, 5001, Santo André, São Paulo 09210-580, Brazil
| | - Daniel A Heinze
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. Dos Estados, 5001, Santo André, São Paulo 09210-580, Brazil
| | - Joana B Sacramento
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. Dos Estados, 5001, Santo André, São Paulo 09210-580, Brazil
| | - Alexandre J C Lanfredi
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. Dos Estados, 5001, Santo André, São Paulo 09210-580, Brazil
| | - Danilo J Carastan
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. Dos Estados, 5001, Santo André, São Paulo 09210-580, Brazil
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238
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Ruhunage C, Dhawan V, Nawarathne CP, Hoque A, Cui XT, Alvarez NT. Evaluation of Polymer-Coated Carbon Nanotube Flexible Microelectrodes for Biomedical Applications. Bioengineering (Basel) 2023; 10:647. [PMID: 37370578 DOI: 10.3390/bioengineering10060647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/19/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
The demand for electrically insulated microwires and microfibers in biomedical applications is rapidly increasing. Polymer protective coatings with high electrical resistivity, good chemical resistance, and a long shelf-life are critical to ensure continuous device operation during chronic applications. As soft and flexible electrodes can minimize mechanical mismatch between tissues and electronics, designs based on flexible conductive microfibers, such as carbon nanotube (CNT) fibers, and soft polymer insulation have been proposed. In this study, a continuous dip-coating approach was adopted to insulate meters-long CNT fibers with hydrogenated nitrile butadiene rubber (HNBR), a soft and rubbery insulating polymer. Using this method, 4.8 m long CNT fibers with diameters of 25-66 µm were continuously coated with HNBR without defects or interruptions. The coated CNT fibers were found to be uniform, pinhole free, and biocompatible. Furthermore, the HNBR coating had better high-temperature tolerance than conventional insulating materials. Microelectrodes prepared using the HNBR-coated CNT fibers exhibited stable electrochemical properties, with a specific impedance of 27.0 ± 9.4 MΩ µm2 at 1.0 kHz and a cathodal charge storage capacity of 487.6 ± 49.8 mC cm-2. Thus, the developed electrodes express characteristics that made them suitable for use in implantable medical devices for chronic in vivo applications.
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Affiliation(s)
- Chethani Ruhunage
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Vaishnavi Dhawan
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | | | - Abdul Hoque
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Xinyan Tracy Cui
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Noe T Alvarez
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA
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239
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Alosime EM, Adam OA, Basfar AA. Encapsulation of Carbon Nanotubes by Styrene and Butyl Acrylate Particles via Suspension Polymerization for Polymerized Toner Applications. Materials (Basel) 2023; 16:ma16113941. [PMID: 37297076 DOI: 10.3390/ma16113941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023]
Abstract
Electrophotographic printing and copying processes primarily use toner, which is a mixture of colorant, polymer, and additives. Toner can be made using traditional mechanical milling techniques or more contemporary chemical polymerization techniques. Suspension polymerization provides spherical particles with less stabilizer adsorption, homogeneous monomers, higher purity, and easier control of the reaction temperature. In contrast to these advantages, however, the particle size resulting from suspension polymerization is too large for toner. To overcome this disadvantage, devices such as high-speed stirrers and homogenizers can be used to reduce the size of the droplets. This research investigated the use of carbon nanotubes (CNTs) instead of carbon black as the pigment in toner development. We succeeded in achieving a good dispersion of four different types of CNT, specifically modified with NH2 and Boron or unmodified with long or short chains in water rather than chloroform, using sodium n-dodecyl sulfate as a stabilizer. We then performed polymerization of the monomers styrene and butyl acrylate in the presence of the different CNT types and found that the best monomer conversion and largest particles (in the micron range) occurred with CNTs modified with boron. The insertion of a charge control agent into the polymerized particles was achieved. Monomer conversion of over 90% was realized with all concentrations of MEP-51, whereas conversion was under 70% with all concentrations of MEC-88. Furthermore, analysis with dynamic light scattering and scanning electron microscopy (SEM) indicated that all polymerized particles were in the micron size range, suggesting that our newly developed toner particles were less harmful and environmentally friendly products than those typically and commercially available. The SEM micrographs clearly showed good dispersion and attachment of the CNTs on the polymerized particles (no CNT aggregation was found), which has never been published before.
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Affiliation(s)
- Eid M Alosime
- King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
| | - Omar A Adam
- Leibniz Institute of Polymer Research Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Ahmed A Basfar
- Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
- Nuclear Engineering Program, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
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240
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Nikitina NA, Ryabkin DI, Suchkova VV, Kuksin AV, Pyankov ES, Ichkitidze LP, Maksimkin AV, Kitsyuk EP, Gerasimenko EA, Telyshev DV, Bobrinetskiy I, Selishchev SV, Gerasimenko AY. Laser-Formed Sensors with Electrically Conductive MWCNT Networks for Gesture Recognition Applications. Micromachines (Basel) 2023; 14:1106. [PMID: 37374691 DOI: 10.3390/mi14061106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/21/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023]
Abstract
Currently, an urgent need in the field of wearable electronics is the development of flexible sensors that can be attached to the human body to monitor various physiological indicators and movements. In this work, we propose a method for forming an electrically conductive network of multi-walled carbon nanotubes (MWCNT) in a matrix of silicone elastomer to make stretchable sensors sensitive to mechanical strain. The electrical conductivity and sensitivity characteristics of the sensor were improved by using laser exposure, through the effect of forming strong carbon nanotube (CNT) networks. The initial electrical resistance of the sensors obtained using laser technology was ~3 kOhm (in the absence of deformation) at a low concentration of nanotubes of 3 wt% in composition. For comparison, in a similar manufacturing process, but without laser exposure, the active material had significantly higher values of electrical resistance, which was ~19 kOhm in this case. The laser-fabricated sensors have a high tensile sensitivity (gauge factor ~10), linearity of >0.97, a low hysteresis of 2.4%, tensile strength of 963 kPa, and a fast strain response of 1 ms. The low Young's modulus values of ~47 kPa and the high electrical and sensitivity characteristics of the sensors made it possible to fabricate a smart gesture recognition sensor system based on them, with a recognition accuracy of ~94%. Data reading and visualization were performed using the developed electronic unit based on the ATXMEGA8E5-AU microcontroller and software. The obtained results open great prospects for the application of flexible CNT sensors in intelligent wearable devices (IWDs) for medical and industrial applications.
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Affiliation(s)
- Natalia A Nikitina
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Dmitry I Ryabkin
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Victoria V Suchkova
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Artem V Kuksin
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Evgeny S Pyankov
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Levan P Ichkitidze
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Aleksey V Maksimkin
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Evgeny P Kitsyuk
- Scientific-Manufacturing Complex "Technological Centre", Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Ekaterina A Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Dmitry V Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Ivan Bobrinetskiy
- Center for Probe Microscopy and Nanotechnology, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Sergey V Selishchev
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Alexander Yu Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
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241
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Ryabkin D, Meglinsk I, Gerasimenko A. Amendments of weld formation in human skin laser soldering. J Biophotonics 2023:e202300070. [PMID: 37210650 DOI: 10.1002/jbio.202300070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/28/2023] [Accepted: 05/02/2023] [Indexed: 05/22/2023]
Abstract
A computational modeling is employed for quantitative assessment of weld formation and area of tissue temperature necrosis during the human skin laser soldering. The evaluation is carried out depending on the components composition of using solders, including bovine serum albumin (BSA), indocyanine green (ICG), and carbon nanotubes (CNT), as well as the angle of incidence of laser light and its pulse duration. The influence of CNT on the change of thermodynamic characteristics of albumin denaturation and the rate of formation of the laser weld is investigated. The obtained results suggest to limit the duration of laser light pulse by temperature relaxation time to minimize transfer of thermal energy to reduce the heating of human skin tissues. The developed model has a great potential for further optimization of laser soldering of biological tissues technology with greater efficiency in minimizing the weld area. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Dmitrii Ryabkin
- Institute of Biomedical Systems, National Research University of Electronic Technology, Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Igor Meglinsk
- Optoelectronics and Measurement Techniques, University of Oulu, Oulu, Finland
- College of Engineering and Physical Sciences, Aston University, Birmingham, UK
| | - Alexander Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
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242
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Hu X, Bao X, Zhang M, Fang S, Liu K, Wang J, Liu R, Kim SH, Baughman RH, Ding J. Recent Advances in Carbon Nanotube-Based Energy Harvesting Technologies. Adv Mater 2023:e2303035. [PMID: 37209369 DOI: 10.1002/adma.202303035] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/14/2023] [Indexed: 05/22/2023]
Abstract
There has been enormous interest in technologies that generate electricity from ambient energy such as solar, thermal, and mechanical energy, due to their potential for providing sustainable solutions to the energy crisis. One driving force behind the search for new energy-harvesting technologies is the desire to power sensor networks and portable devices without batteries, such as self-powered wearable electronics, human health monitoring systems, and implantable wireless sensors. Various energy harvesting technologies have been demonstrated in recent years. Among them, electrochemical, hydroelectric, triboelectric, piezoelectric, and thermoelectric nanogenerators have been extensively studied because of their special physical properties, ease of application, and sometimes high obtainable efficiency. Multifunctional carbon nanotubes (CNTs) have attracted much interest in energy harvesting because of their exceptionally high gravimetric power outputs and recently obtained high energy conversion efficiencies. Further development of this field, however, still requires an in-depth understanding of harvesting mechanisms and boosting of the electrical outputs for wider applications. Here, various CNT-based energy harvesting technologies are comprehensively reviewed, focusing on working principles, typical examples, and future improvements. The last section discusses the existing challenges and future directions of CNT-based energy harvesters.
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Affiliation(s)
- Xinghao Hu
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Xianfu Bao
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Mengmeng Zhang
- Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Shaoli Fang
- Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Kangyu Liu
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Jian Wang
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Runmin Liu
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Shi Hyeong Kim
- Department of Advanced Textile R&D, Korea Institute of Industrial Technology, Ansan-si, Gyeonggi-do, 15588, Republic of Korea
| | - Ray H Baughman
- Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Jianning Ding
- Institute of Intelligent Flexible Mechatronics & School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
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243
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Mi D, Zhao Z, Bai H. Effects of Orientation and Dispersion on Electrical Conductivity and Mechanical Properties of Carbon Nanotube/Polypropylene Composite. Polymers (Basel) 2023; 15:polym15102370. [PMID: 37242948 DOI: 10.3390/polym15102370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/15/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
The orientation and dispersion of nanoparticles can greatly influence the conductivity and mechanical properties of nanocomposites. In this study, the Polypropylene/ Carbon Nanotubes (PP/CNTs) nanocomposites were produced using three different molding methods, i.e., compression molding (CM), conventional injection molding (IM), and interval injection molding (IntM). Various CNTs content and shear conditions give CNTs different dispersion and orientation states. Then, three electrical percolation thresholds (4 wt.% CM, 6 wt.% IM, and 9 wt.% IntM) were obtained by various CNTs dispersion and orientations. Agglomerate dispersion (Adis), agglomerate orientation (Aori), and molecular orientation (Mori) are used to quantify the CNTs dispersion and orientation degree. IntM uses high shear to break the agglomerates and promote the Aori, Mori, and Adis. Large Aori and Mori can create a path along the flow direction, which lead to an electrical anisotropy of nearly six orders of magnitude in the flow and transverse direction. On the other hand, when CM and IM samples already build the conductive network, IntM can triple the Adis and destroy the network. Moreover, mechanical properties are also been discussed, such as the increase in tensile strength with Aori and Mori but showing independence with Adis. This paper proves that the high dispersion of CNTs agglomerate goes against forming a conductivity network. At the same time, the increased orientation of CNTs causes the electric current to flow only in the orientation direction. It helps to prepare PP/CNTs nanocomposites on demand by understanding the influence of CNTs dispersion and orientation on mechanical and electrical properties.
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Affiliation(s)
- Dashan Mi
- School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723001, China
| | - Zhongguo Zhao
- School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China
| | - Haiqing Bai
- School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723001, China
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244
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Araia A, Wang Y, Jiang C, Brown S, Caiola A, Robinson B, Li W, Hu J. Insight into Enhanced Microwave Heating for Ammonia Synthesis: Effects of CNT on the Cs-Ru/CeO 2 Catalyst. ACS Appl Mater Interfaces 2023; 15:24296-24305. [PMID: 37167454 PMCID: PMC10214378 DOI: 10.1021/acsami.3c00132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Ammonia is emerging as a potential decarbonized H2 energy carrier when produced from renewable energy. The on-site production of liquid ammonia from stranded renewable energy can solve the current energy transportation challenges. The employment of microwave technology can produce the desired ammonia product at milder conditions with the supply of intermittent renewable energy sources. Our previous studies have indicated that the Cs-Ru/CeO2 catalyst is a promising catalyst for microwave-driven ammonia synthesis. In this study, the Cs-Ru/CeO2 catalyst mechanically mixed with carbon nanotubes (CNT) and chemically synthesized using coprecipitation and a hydrothermal method is investigated systematically at low temperatures and atmospheric pressure for microwave-assisted ammonia synthesis. Additionally, the combination of two Ru-based catalysts (Cs-Ru/CeO2 and Cs-Ru/CNT) is studied as well. Mechanical mixing of Cs-Ru/CeO2 with CNT exhibited superior activity as compared to the chemically synthesized Cs-Ru/CeO2-CNT catalyst. Besides the enhancement in dielectric property, the probable synergistic effect leads to increased interfacial polarization at the interface of the mechanically mixed catalyst, improving the overall heating and ammonia production rate. Moreover, the combined Ru-based catalyst also exhibited higher activity as compared to their individual activity toward ammonia synthesis. Numerous characterization techniques were performed, including thermal imaging camera and dielectric measurements, to better understand microwave interaction with the composite catalysts.
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Affiliation(s)
- Alazar Araia
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Yuxin Wang
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Changle Jiang
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Sean Brown
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Ashley Caiola
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Brandon Robinson
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Wenyuan Li
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
| | - Jianli Hu
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506-6201, United States
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245
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Han J, Huang K, Su X, Xiao X, Gong X, Wang H, Cao J. Carbon Nanotube Transistor with Colloidal Quantum Dot Photosensitive Gate for Ultrahigh External Quantum Efficiency Photodetector. ACS Nano 2023; 17:9510-9520. [PMID: 37166009 DOI: 10.1021/acsnano.3c02064] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
PbS colloidal quantum dots (CQDs) are promising building block for developing the next-generation high-performance near-infrared (NIR) photodetector. However, due to the surface ligand isolation and surface defects, PbS CQDs usually suffer from low carrier mobility, which limits further optimization of PbS CQDs-based optoelectronic devices. Here, the combination of PbS CQD photodiode and carbon nanotube (CNT) film field-effect transistor (FET) achieves a transistorized NIR photodetector with a photosensitive gate. The photogenerated electrons are drifted to the dielectric surface by a negative gate electric field and built-in electric field, serving as an equivalent gate voltage to turn on the CNT FET, thus realizing the conversion of optical signals to electrical signals. The photodetector exhibits high performance, with a responsivity and detectivity of 41.9 A/W and 3.04 × 1011 Jones under 950 nm illumination, respectively. More importantly, the photodetector achieves an ultrahigh external quantum efficiency (EQE) of 5470% due to the CNT FET amplification function. Besides, the photodetector demonstrates a versatile photoresponse that allows for regulation of responsivity, detectivity, and EQE over a wide range through gate voltage control. The photodetector shows immense potential in NIR photodetection applications, and the distinctive structure of the optical module and electrical module separation also provides fresh thinking for the research and development of the next generation of optoelectronic devices.
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Affiliation(s)
- Jianfu Han
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, Hunan 411105, PR China
| | - Kai Huang
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, Hunan 411105, PR China
- School of Physics and Optoelectronics, Xiangtan University, Xiangtan, Hunan 411105, PR China
| | - Xuanguang Su
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, Hunan 411105, PR China
| | - Xiaofei Xiao
- School of Physics and Optoelectronics, Xiangtan University, Xiangtan, Hunan 411105, PR China
| | - Xuemin Gong
- School of Physics and Optoelectronics, Xiangtan University, Xiangtan, Hunan 411105, PR China
| | - Haibin Wang
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - Juexian Cao
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, Hunan 411105, PR China
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246
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Podar D, Boza CL, Lung I, Soran ML, Culicov O, Stegarescu A, Opriş O, Ciorîță A, Nekhoroshkov P. The Effect of Functionalized Multiwall Carbon Nanotubes with Fe and Mn Oxides on Lactuca sativa L. Plants (Basel) 2023; 12:1959. [PMID: 37653877 PMCID: PMC10222390 DOI: 10.3390/plants12101959] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/04/2023] [Accepted: 05/07/2023] [Indexed: 09/02/2023]
Abstract
The aim of this work was to evaluate the effect of six nanomaterials, namely CNT-COOH, CNT-MnO2, CNT-Fe3O4, CNT-MnO2-Fe3O4, MnO2, and Fe3O4 on lettuceTo determine the impact of nanomaterials on lettuce, the results obtained were compared with those for the control plant, grown in the same conditions of light, temperature, and humidity but without the addition of nanomaterial. The study found that the content of bioactive compounds and the antioxidant capacity varied in the treated plants compared to the control ones, depending on the nanomaterial. The use of CNTs functionalized with metal oxides increases the elemental concentration of lettuce leaves for the majority of the elements. On the contrary, metal oxide nanoparticles and CNT functionalized with carboxyl groups induce a decrease in the concentration of many elements. Soil amending with MnO2 affects the content of more than ten elements in leaves. Simultaneous application of CNT and MnO2 stimulates the elemental translocation of all elements from roots to leaves, but the simultaneous use of CNT and Fe3O4 leads to the most intense translocation compared to the control other than Mo.
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Affiliation(s)
- Dorina Podar
- Faculty of Biology and Geology, Babeș-Bolyai University, 1 Kogălniceanu St., 400084 Cluj-Napoca, Romania; (D.P.); (C.-L.B.)
| | - Camelia-Loredana Boza
- Faculty of Biology and Geology, Babeș-Bolyai University, 1 Kogălniceanu St., 400084 Cluj-Napoca, Romania; (D.P.); (C.-L.B.)
| | - Ildiko Lung
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (I.L.); (M.-L.S.); (A.S.); (O.O.); (A.C.)
| | - Maria-Loredana Soran
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (I.L.); (M.-L.S.); (A.S.); (O.O.); (A.C.)
| | - Otilia Culicov
- Joint Institute for Nuclear Research, 6 Joliot-Curie, 1419890 Dubna, Russia;
- National Institute for Research and Development in Electrical Engineering ICPE-CA, 313 Splaiul Unirii, 030138 Bucharest, Romania
| | - Adina Stegarescu
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (I.L.); (M.-L.S.); (A.S.); (O.O.); (A.C.)
| | - Ocsana Opriş
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (I.L.); (M.-L.S.); (A.S.); (O.O.); (A.C.)
| | - Alexandra Ciorîță
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania; (I.L.); (M.-L.S.); (A.S.); (O.O.); (A.C.)
| | - Pavel Nekhoroshkov
- Joint Institute for Nuclear Research, 6 Joliot-Curie, 1419890 Dubna, Russia;
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247
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Wais M, Bagsican FRG, Komatsu N, Gao W, Serita K, Murakami H, Held K, Kawayama I, Kono J, Battiato M, Tonouchi M. Transition from Diffusive to Superdiffusive Transport in Carbon Nanotube Networks via Nematic Order Control. Nano Lett 2023; 23:4448-4455. [PMID: 37164003 DOI: 10.1021/acs.nanolett.3c00765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The one-dimensional confinement of quasiparticles in individual carbon nanotubes (CNTs) leads to extremely anisotropic electronic and optical properties. In a macroscopic ensemble of randomly oriented CNTs, this anisotropy disappears together with other properties that make them attractive for certain device applications. The question however remains if not only anisotropy but also other types of behaviors are suppressed by disorder. Here, we compare the dynamics of quasiparticles under strong electric fields in aligned and random CNT networks using a combination of terahertz emission and photocurrent experiments and out-of-equilibrium numerical simulations. We find that the degree of alignment strongly influences the excited quasiparticles' dynamics, rerouting the thermalization pathways. This is, in particular, evidenced in the high-energy, high-momentum electronic population (probed through the formation of low energy excitons via exciton impact ionization) and the transport regime evolving from diffusive to superdiffusive.
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Affiliation(s)
- Michael Wais
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore
- Institute for Solid State Physics, TU Wien, 1040 Vienna, Austria
| | | | - Natsumi Komatsu
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Weilu Gao
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Kazunori Serita
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hironaru Murakami
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Karsten Held
- Institute for Solid State Physics, TU Wien, 1040 Vienna, Austria
| | - Iwao Kawayama
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Junichiro Kono
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
- Department of Material Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Marco Battiato
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore
| | - Masayoshi Tonouchi
- Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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248
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Carrola M, Fallahi H, Koerner H, Pérez LM, Asadi A. Fundamentals of Crystalline Evolution and Properties of Carbon Nanotube-Reinforced Polyether Ether Ketone Nanocomposites in Fused Filament Fabrication. ACS Appl Mater Interfaces 2023; 15:22506-22523. [PMID: 37099604 PMCID: PMC10853907 DOI: 10.1021/acsami.3c01307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 04/12/2023] [Indexed: 05/11/2023]
Abstract
As fused filament fabrication (FFF) continues to gain popularity, many studies are turning to nanomaterials or optimization of printing parameters to improve the materials' properties; however, many overlook how materials formulation and additive manufacturing (AM) processes cooperatively engineer the evolution of properties across length scales. Evaluating the in-process evolution of the nanocomposite using AM will provide a fundamental understanding of the material's microstructure, which can be tailored to create unique characteristics in functionality and performance. In this study, the crystallinity behavior of polyetheretherketone (PEEK) was studied in the presence of carbon nanotubes (CNTs) as a nucleation aid for improved crystallization during FFF processing. Using various characterization techniques and molecular dynamics simulations, it was discovered that the crystallization behavior of extruded filaments is very different from that of 3D printed roads. Additionally, the printed material exhibited cold crystallization, and the CNT addition increased the crystallization of printed roads, which were amorphous without CNT addition. Tensile strength and modulus were increased by as much as 42 and 51%, respectively, due to higher crystallinity during printing. Detailed knowledge on the morphology of PEEK-CNT used in FFF allows gaining a fundamental understanding of the morphological evolution occurring during the AM process that in turn enables formulating materials for the AM process to achieve tailored mechanical and functional properties, such as crystallinity or conductivity.
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Affiliation(s)
- Mia Carrola
- Department
of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Hamed Fallahi
- Department
of Mechanical Engineering, Texas A&M
University, College Station, Texas 77843, United States
| | - Hilmar Koerner
- Materials
& Manufacturing Directorate, Air Force
Research Laboratory, WPAFB, Dayton, Ohio 45430, United States
| | - Lisa M. Pérez
- High
Performance Research Computing, Texas A&M
University, MS 3361, College Station, Texas 77843-3361, United States
| | - Amir Asadi
- Department
of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department
of Mechanical Engineering, Texas A&M
University, College Station, Texas 77843, United States
- Department
of Engineering Technology & Industrial Distribution, Texas A&M University, College Station, Texas 77843, United States
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249
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Eremin T, Eremina V, Svirko Y, Obraztsov P. Over Two-Fold Photoluminescence Enhancement from Single-Walled Carbon Nanotubes Induced by Oxygen Doping. Nanomaterials (Basel) 2023; 13:nano13091561. [PMID: 37177106 PMCID: PMC10180646 DOI: 10.3390/nano13091561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
Covalent functionalization of single-walled carbon nanotubes (SWCNTs) is a promising way to improve their photoluminescent (PL) brightness and thus make them applicable as a base material for infrared light emitters. We report as high as over two-fold enhancement of the SWCNT PL brightness by using oxygen doping via the UV photodissociation of hypochlorite ions. By analyzing the temporal evolution of the PL and Raman spectra of SWCNTs in the course of the doping process, we conclude that the enhancement of SWCNTs PL brightness depends on the homogeneity of induced quantum defects distribution over the SWCNT surface.
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Affiliation(s)
- Timofei Eremin
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Yliopistokatu 2, 80101 Joensuu, Finland
| | - Valentina Eremina
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Yliopistokatu 2, 80101 Joensuu, Finland
| | - Yuri Svirko
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Yliopistokatu 2, 80101 Joensuu, Finland
| | - Petr Obraztsov
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Yliopistokatu 2, 80101 Joensuu, Finland
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Maksimova Y, Zorina A, Nesterova L. Oxidative Stress Response and E. coli Biofilm Formation under the Effect of Pristine and Modified Carbon Nanotubes. Microorganisms 2023; 11:1221. [PMID: 37317195 DOI: 10.3390/microorganisms11051221] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/30/2023] [Accepted: 05/04/2023] [Indexed: 06/16/2023] Open
Abstract
The article investigates the expression of oxyR and soxS oxidative stress genes in E. coli under the effect of pristine multi-walled carbon nanotubes (MWCNTs) and pristine single-walled carbon nanotubes (SWCNTs), MWCNTs and SWCNTs functionalized with carboxyl groups (MWCNTs-COOH and SWCNTs-COOH, respectively), SWCNTs functionalized with amino groups (SWCNTs-NH2) and SWCNTs functionalized with octadecylamine (SWCNTs-ODA). Significant differences were found in the expression of the soxS gene, while no changes were observed in the expression level of the oxyR gene. The pro-oxidant effect of SWCNTs, SWCNTs-COOH, SWCNTs-NH2, and SWCNTs-ODA is presented, and the contrary antioxidant effect of pristine MWCNTs and MWCNTs-COOH in the presence of methyl viologen hydrate (paraquat) is shown. The article shows that SWCNTs-COOH, SWCNTs-NH2, and SWCNTs-ODA added to the medium generate the production of reactive oxygen species (ROS) in bacterial cells. SWCNTs-COOH intensified the E. coli biofilm formation, and the biofilm biomass exceeded the control by 25 times. Additionally, it is shown that the rpoS expression increased in response to MWCNTs-COOH and SWCNTs-COOH, and the effect of SWCNTs-COOH was more significant. SWCNTs-COOH and SWCNTs-NH2 initiated an increase in ATP concentration in the planktonic cells and a decrease in the biofilm cells. The atomic force microscopy (AFM) method showed that the volume of E. coli planktonic cells after the exposure to carbon nanotubes (CNTs) decreased compared to that without exposure, mainly due to a decrease in cell height. The absence of a strong damaging effect of functionalized SWCNTs on E. coli K12 cells, both in suspension and in biofilms, is shown. Contact with functionalized SWCNTs initiated the aggregation of the polymeric substances of the biofilms; however, the cells did not lyse. Among the studied CNTs, SWCNTs-COOH caused an increased expression of the soxS and rpoS, the formation of ROS, and stimulation of the biofilm formation.
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Affiliation(s)
- Yuliya Maksimova
- Laboratory of Molecular Biotechnology, Institute of Ecology and Genetics of Microorganisms UB RAS, 614081 Perm, Russia
- Department of Microbiology and Immunology, Perm State University, 614990 Perm, Russia
| | - Anastasiya Zorina
- Laboratory of Molecular Biotechnology, Institute of Ecology and Genetics of Microorganisms UB RAS, 614081 Perm, Russia
| | - Larisa Nesterova
- Laboratory of Adaptation of Microorganisms, Institute of Ecology and Genetics of Microorganisms UB RAS, 614081 Perm, Russia
- Department of Plant Physiology and Soil Ecology, Perm State University, 614990 Perm, Russia
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